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135143 = 149907
BaseRepresentation
bin100000111111100111
320212101022
4200333213
513311033
62521355
71102001
oct407747
9225338
10135143
1192598
126625b
1349688
1437371
152a098
hex20fe7

135143 has 4 divisors (see below), whose sum is σ = 136200. Its totient is φ = 134088.

The previous prime is 135131. The next prime is 135151. The reversal of 135143 is 341531.

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: 341531 = 2391429.

It is a cyclic number.

It is not a de Polignac number, because 135143 - 28 = 134887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305 + ... + 602.

It is an arithmetic number, because the mean of its divisors is an integer number (34050).

2135143 is an apocalyptic number.

135143 is the 197-th centered heptagonal number.

135143 is a deficient number, since it is larger than the sum of its proper divisors (1057).

135143 is an equidigital number, since it uses as much as digits as its factorization.

135143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its digits is 180, while the sum is 17.

The square root of 135143 is about 367.6180082640. The cubic root of 135143 is about 51.3173850871.

Adding to 135143 its reverse (341531), we get a palindrome (476674).

The spelling of 135143 in words is "one hundred thirty-five thousand, one hundred forty-three".

Divisors: 1 149 907 135143