15912361 has 2 divisors, whose sum is σ = 15912362. Its totient is φ = 15912360.

The previous prime is 15912313. The next prime is 15912371. The reversal of 15912361 is 16321951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11155600 + 4756761 = 3340^2 + 2181^2 .

It is a cyclic number.

It is not a de Polignac number, because 15912361 - 2¹⁵ = 15879593 is a prime.

It is not a weakly prime, because it can be changed into another prime (15912301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7956180 + 7956181.

It is an arithmetic number, because the mean of its divisors is an integer number (7956181).

Almost surely, 2^15912361 is an apocalyptic number.

It is an amenable number.

15912361 is a deficient number, since it is larger than the sum of its proper divisors (1).

15912361 is an equidigital number, since it uses as much as digits as its factorization.

15912361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 28.

The square root of 15912361 is about 3989.0300826141. The cubic root of 15912361 is about 251.5232914807.

The spelling of 15912361 in words is "fifteen million, nine hundred twelve thousand, three hundred sixty-one".