15372961 has 4 divisors (see below), whose sum is σ = 15393924. Its totient is φ = 15352000.

The previous prime is 15372941. The next prime is 15372971. The reversal of 15372961 is 16927351.

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 14400 + 15358561 = 120^2 + 3919^2 .

It is a cyclic number.

It is not a de Polignac number, because 15372961 - 2²¹ = 13275809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15372911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9340 + ... + 10861.

It is an arithmetic number, because the mean of its divisors is an integer number (3848481).

Almost surely, 2^15372961 is an apocalyptic number.

It is an amenable number.

15372961 is a deficient number, since it is larger than the sum of its proper divisors (20963).

15372961 is an equidigital number, since it uses as much as digits as its factorization.

15372961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20962.

The product of its digits is 11340, while the sum is 34.

The square root of 15372961 is about 3920.8367729351. The cubic root of 15372961 is about 248.6484989454.

The spelling of 15372961 in words is "fifteen million, three hundred seventy-two thousand, nine hundred sixty-one".