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143641 = 3792
BaseRepresentation
bin100011000100011001
321022001001
4203010121
514044031
63025001
71135531
oct430431
9238031
10143641
1198a13
126b161
13504c4
143a4c1
152c861
hex23119

143641 has 3 divisors (see below), whose sum is σ = 144021. Its totient is φ = 143262.

The previous prime is 143629. The next prime is 143651. The reversal of 143641 is 146341.

Adding to 143641 its reverse (146341), we get a palindrome (289982).

It can be divided in two parts, 14364 and 1, that added together give a triangular number (14365 = T169).

143641 = T378 + T379.

It is a happy number.

The square root of 143641 is 379.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146341 = 1311257.

It is not a de Polignac number, because 143641 - 25 = 143609 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 190 + ... + 568.

It is an arithmetic number, because the mean of its divisors is an integer number (48007).

2143641 is an apocalyptic number.

143641 is the 379-th square number.

143641 is the 190-th centered octagonal number.

It is an amenable number.

143641 is a deficient number, since it is larger than the sum of its proper divisors (380).

143641 is an frugal number, since it uses more digits than its factorization.

143641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 379 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The cubic root of 143641 is about 52.3712339441.

The spelling of 143641 in words is "one hundred forty-three thousand, six hundred forty-one".

Divisors: 1 379 143641