15256042 has 4 divisors (see below), whose sum is σ = 22884066. Its totient is φ = 7628020.

The previous prime is 15256037. The next prime is 15256067. The reversal of 15256042 is 24065251.

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

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 7241481 = 2831^2 + 2691^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15255998 and 15256016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3814009 + ... + 3814012.

Almost surely, 2^15256042 is an apocalyptic number.

15256042 is a deficient number, since it is larger than the sum of its proper divisors (7628024).

15256042 is an equidigital number, since it uses as much as digits as its factorization.

15256042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628023.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 15256042 is about 3905.8983601727. The cubic root of 15256042 is about 248.0165289885.

The spelling of 15256042 in words is "fifteen million, two hundred fifty-six thousand, forty-two".