15247081 has 2 divisors, whose sum is σ = 15247082. Its totient is φ = 15247080.

The previous prime is 15247073. The next prime is 15247087. The reversal of 15247081 is 18074251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9511056 + 5736025 = 3084^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 15247081 - 2³ = 15247073 is a prime.

It is a super-2 number, since 2×15247081² = 464946958041122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15247087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7623540 + 7623541.

It is an arithmetic number, because the mean of its divisors is an integer number (7623541).

Almost surely, 2^15247081 is an apocalyptic number.

It is an amenable number.

15247081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15247081 is an equidigital number, since it uses as much as digits as its factorization.

15247081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 15247081 is about 3904.7510804147. The cubic root of 15247081 is about 247.9679600041.

The spelling of 15247081 in words is "fifteen million, two hundred forty-seven thousand, eighty-one".