15797249 has 4 divisors (see below), whose sum is σ = 17012436. Its totient is φ = 14582064.

The previous prime is 15797237. The next prime is 15797263. The reversal of 15797249 is 94279751.

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 1113025 + 14684224 = 1055^2 + 3832^2 .

It is a cyclic number.

It is not a de Polignac number, because 15797249 - 2⁸ = 15796993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15797269) 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, 607574 + ... + 607599.

It is an arithmetic number, because the mean of its divisors is an integer number (4253109).

Almost surely, 2^15797249 is an apocalyptic number.

It is an amenable number.

15797249 is a deficient number, since it is larger than the sum of its proper divisors (1215187).

15797249 is a wasteful number, since it uses less digits than its factorization.

15797249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215186.

The product of its digits is 158760, while the sum is 44.

The square root of 15797249 is about 3974.5753232264. The cubic root of 15797249 is about 250.9153061025.

The spelling of 15797249 in words is "fifteen million, seven hundred ninety-seven thousand, two hundred forty-nine".