25715447 has 2 divisors, whose sum is σ = 25715448. Its totient is φ = 25715446.

The previous prime is 25715411. The next prime is 25715453. The reversal of 25715447 is 74451752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25715447 - 2²⁴ = 8938231 is a prime.

It is a super-2 number, since 2×25715447² = 1322568428819618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25715467) 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, 12857723 + 12857724.

It is an arithmetic number, because the mean of its divisors is an integer number (12857724).

Almost surely, 2^25715447 is an apocalyptic number.

25715447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25715447 is an equidigital number, since it uses as much as digits as its factorization.

25715447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 35.

The square root of 25715447 is about 5071.0400313940. The cubic root of 25715447 is about 295.1648872328.

It can be divided in two parts, 25715 and 447, that added together give a palindrome (26162).

The spelling of 25715447 in words is "twenty-five million, seven hundred fifteen thousand, four hundred forty-seven".