15923261 has 2 divisors, whose sum is σ = 15923262. Its totient is φ = 15923260.

The previous prime is 15923239. The next prime is 15923279. The reversal of 15923261 is 16232951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9703225 + 6220036 = 3115^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 15923261 - 2¹⁸ = 15661117 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15923221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7961630 + 7961631.

It is an arithmetic number, because the mean of its divisors is an integer number (7961631).

Almost surely, 2^15923261 is an apocalyptic number.

It is an amenable number.

15923261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15923261 is an equidigital number, since it uses as much as digits as its factorization.

15923261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 15923261 is about 3990.3960956276. The cubic root of 15923261 is about 251.5807096961.

The spelling of 15923261 in words is "fifteen million, nine hundred twenty-three thousand, two hundred sixty-one".