15406961 has 2 divisors, whose sum is σ = 15406962. Its totient is φ = 15406960.

The previous prime is 15406933. The next prime is 15406991. The reversal of 15406961 is 16960451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15358561 + 48400 = 3919^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 15406961 - 2¹⁰ = 15405937 is a prime.

It is not a weakly prime, because it can be changed into another prime (15406931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7703480 + 7703481.

It is an arithmetic number, because the mean of its divisors is an integer number (7703481).

Almost surely, 2^15406961 is an apocalyptic number.

It is an amenable number.

15406961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15406961 is an equidigital number, since it uses as much as digits as its factorization.

15406961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 15406961 is about 3925.1701873932. The cubic root of 15406961 is about 248.8316738951.

The spelling of 15406961 in words is "fifteen million, four hundred six thousand, nine hundred sixty-one".