15172961 has 2 divisors, whose sum is σ = 15172962. Its totient is φ = 15172960.

The previous prime is 15172931. The next prime is 15172967. The reversal of 15172961 is 16927151.

15172961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15171025 + 1936 = 3895^2 + 44^2 .

It is an emirp because it is prime and its reverse (16927151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15172961 - 2¹⁸ = 14910817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15172967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7586480 + 7586481.

It is an arithmetic number, because the mean of its divisors is an integer number (7586481).

Almost surely, 2^15172961 is an apocalyptic number.

It is an amenable number.

15172961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15172961 is an equidigital number, since it uses as much as digits as its factorization.

15172961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 15172961 is about 3895.2485158203. The cubic root of 15172961 is about 247.5654950294.

The spelling of 15172961 in words is "fifteen million, one hundred seventy-two thousand, nine hundred sixty-one".