25685477 has 2 divisors, whose sum is σ = 25685478. Its totient is φ = 25685476.

The previous prime is 25685461. The next prime is 25685497. The reversal of 25685477 is 77458652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23512801 + 2172676 = 4849^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 25685477 - 2⁴ = 25685461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25685497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842738 + 12842739.

It is an arithmetic number, because the mean of its divisors is an integer number (12842739).

Almost surely, 2^25685477 is an apocalyptic number.

It is an amenable number.

25685477 is a deficient number, since it is larger than the sum of its proper divisors (1).

25685477 is an equidigital number, since it uses as much as digits as its factorization.

25685477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 44.

The square root of 25685477 is about 5068.0841547867. The cubic root of 25685477 is about 295.0501762779.

It can be divided in two parts, 25685 and 477, that added together give a palindrome (26162).

The spelling of 25685477 in words is "twenty-five million, six hundred eighty-five thousand, four hundred seventy-seven".