15772961 has 2 divisors, whose sum is σ = 15772962. Its totient is φ = 15772960.

The previous prime is 15772937. The next prime is 15772973. The reversal of 15772961 is 16927751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13653025 + 2119936 = 3695^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 15772961 - 2¹⁴ = 15756577 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15772931) 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 as a sum of consecutive naturals, namely, 7886480 + 7886481.

It is an arithmetic number, because the mean of its divisors is an integer number (7886481).

Almost surely, 2^15772961 is an apocalyptic number.

It is an amenable number.

15772961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15772961 is an equidigital number, since it uses as much as digits as its factorization.

15772961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 15772961 is about 3971.5187271370. The cubic root of 15772961 is about 250.7866474801.

The spelling of 15772961 in words is "fifteen million, seven hundred seventy-two thousand, nine hundred sixty-one".