15982457 has 2 divisors, whose sum is σ = 15982458. Its totient is φ = 15982456.

The previous prime is 15982441. The next prime is 15982459. The reversal of 15982457 is 75428951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13920361 + 2062096 = 3731^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 15982457 - 2⁴ = 15982441 is a prime.

Together with 15982459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15982459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7991228 + 7991229.

It is an arithmetic number, because the mean of its divisors is an integer number (7991229).

Almost surely, 2^15982457 is an apocalyptic number.

It is an amenable number.

15982457 is a deficient number, since it is larger than the sum of its proper divisors (1).

15982457 is an equidigital number, since it uses as much as digits as its factorization.

15982457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 15982457 is about 3997.8065235827. The cubic root of 15982457 is about 251.8920813206.

The spelling of 15982457 in words is "fifteen million, nine hundred eighty-two thousand, four hundred fifty-seven".