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1402189 = 3737897
BaseRepresentation
bin101010110010101001101
32122020102221
411112111031
5324332224
650015341
714630005
oct5262515
92566387
101402189
11878538
12577551
133a12c9
14287005
151ca6e4
hex15654d

1402189 has 4 divisors (see below), whose sum is σ = 1440124. Its totient is φ = 1364256.

The previous prime is 1402169. The next prime is 1402201. The reversal of 1402189 is 9812041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 537289 + 864900 = 733^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402189 - 25 = 1402157 is a prime.

It is a super-2 number, since 2×14021892 = 3932267983442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402129) 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, 18912 + ... + 18985.

It is an arithmetic number, because the mean of its divisors is an integer number (360031).

21402189 is an apocalyptic number.

It is an amenable number.

1402189 is a deficient number, since it is larger than the sum of its proper divisors (37935).

1402189 is an equidigital number, since it uses as much as digits as its factorization.

1402189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37934.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1402189 is about 1184.1406166499. The cubic root of 1402189 is about 111.9271688487.

The spelling of 1402189 in words is "one million, four hundred two thousand, one hundred eighty-nine".

Divisors: 1 37 37897 1402189