15243256 has 16 divisors (see below), whose sum is σ = 32664240. Its totient is φ = 6532800.

The previous prime is 15243253. The next prime is 15243257. The reversal of 15243256 is 65234251.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15243251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136045 + ... + 136156.

It is an arithmetic number, because the mean of its divisors is an integer number (2041515).

Almost surely, 2^15243256 is an apocalyptic number.

It is an amenable number.

15243256 is an abundant number, since it is smaller than the sum of its proper divisors (17420984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15243256 is a wasteful number, since it uses less digits than its factorization.

15243256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272214 (or 272210 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 15243256 is about 3904.2612617498. The cubic root of 15243256 is about 247.9472225534.

The spelling of 15243256 in words is "fifteen million, two hundred forty-three thousand, two hundred fifty-six".