15252997 has 4 divisors (see below), whose sum is σ = 15274540. Its totient is φ = 15231456.

The previous prime is 15252973. The next prime is 15253009. The reversal of 15252997 is 79925251.

15252997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10439361 + 4813636 = 3231^2 + 2194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15252997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15252907) 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, 9672 + ... + 11137.

It is an arithmetic number, because the mean of its divisors is an integer number (3818635).

Almost surely, 2^15252997 is an apocalyptic number.

It is an amenable number.

15252997 is a deficient number, since it is larger than the sum of its proper divisors (21543).

15252997 is an equidigital number, since it uses as much as digits as its factorization.

15252997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21542.

The product of its digits is 56700, while the sum is 40.

The square root of 15252997 is about 3905.5085456314. The cubic root of 15252997 is about 248.0000270985. Note that the first 4 decimals are identical.

The spelling of 15252997 in words is "fifteen million, two hundred fifty-two thousand, nine hundred ninety-seven".