15256947 has 4 divisors (see below), whose sum is σ = 20342600. Its totient is φ = 10171296.

The previous prime is 15256937. The next prime is 15256993. The reversal of 15256947 is 74965251.

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

It is not a de Polignac number, because 15256947 - 2¹⁵ = 15224179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15256937) 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, 2542822 + ... + 2542827.

It is an arithmetic number, because the mean of its divisors is an integer number (5085650).

Almost surely, 2^15256947 is an apocalyptic number.

15256947 is a deficient number, since it is larger than the sum of its proper divisors (5085653).

15256947 is an equidigital number, since it uses as much as digits as its factorization.

15256947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085652.

The product of its digits is 75600, while the sum is 39.

The square root of 15256947 is about 3906.0142088835. The cubic root of 15256947 is about 248.0214330678.

The spelling of 15256947 in words is "fifteen million, two hundred fifty-six thousand, nine hundred forty-seven".