15390961 has 2 divisors, whose sum is σ = 15390962. Its totient is φ = 15390960.

The previous prime is 15390953. The next prime is 15390989. The reversal of 15390961 is 16909351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15358561 + 32400 = 3919^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 15390961 - 2³ = 15390953 is a prime.

It is not a weakly prime, because it can be changed into another prime (15390941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7695480 + 7695481.

It is an arithmetic number, because the mean of its divisors is an integer number (7695481).

Almost surely, 2^15390961 is an apocalyptic number.

It is an amenable number.

15390961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15390961 is an equidigital number, since it uses as much as digits as its factorization.

15390961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 15390961 is about 3923.1315297859. The cubic root of 15390961 is about 248.7455075239.

The spelling of 15390961 in words is "fifteen million, three hundred ninety thousand, nine hundred sixty-one".