25715477 has 2 divisors, whose sum is σ = 25715478. Its totient is φ = 25715476.

The previous prime is 25715467. The next prime is 25715479. The reversal of 25715477 is 77451752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15437041 + 10278436 = 3929^2 + 3206^2 .

It is a cyclic number.

It is not a de Polignac number, because 25715477 - 2¹⁰ = 25714453 is a prime.

It is a super-2 number, since 2×25715477² = 1322571514675058, which contains 22 as substring.

Together with 25715479, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25715477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25715479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12857738 + 12857739.

It is an arithmetic number, because the mean of its divisors is an integer number (12857739).

Almost surely, 2^25715477 is an apocalyptic number.

It is an amenable number.

25715477 is a deficient number, since it is larger than the sum of its proper divisors (1).

25715477 is an equidigital number, since it uses as much as digits as its factorization.

25715477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68600, while the sum is 38.

The square root of 25715477 is about 5071.0429893662. The cubic root of 25715477 is about 295.1650020140.

The spelling of 25715477 in words is "twenty-five million, seven hundred fifteen thousand, four hundred seventy-seven".