15116257 has 4 divisors (see below), whose sum is σ = 16279060. Its totient is φ = 13953456.

The previous prime is 15116201. The next prime is 15116261. The reversal of 15116257 is 75261151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75261151 = 7 ⋅10751593.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 11566801 = 1884^2 + 3401^2 .

It is a cyclic number.

It is not a de Polignac number, because 15116257 - 2¹⁵ = 15083489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15114257) 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, 581382 + ... + 581407.

It is an arithmetic number, because the mean of its divisors is an integer number (4069765).

Almost surely, 2^15116257 is an apocalyptic number.

It is an amenable number.

15116257 is a deficient number, since it is larger than the sum of its proper divisors (1162803).

15116257 is a wasteful number, since it uses less digits than its factorization.

15116257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162802.

The product of its digits is 2100, while the sum is 28.

The square root of 15116257 is about 3887.9630913886. The cubic root of 15116257 is about 247.2567115811.

The spelling of 15116257 in words is "fifteen million, one hundred sixteen thousand, two hundred fifty-seven".