25856629 has 2 divisors, whose sum is σ = 25856630. Its totient is φ = 25856628.

The previous prime is 25856569. The next prime is 25856651. The reversal of 25856629 is 92665852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 9672100 = 4023^2 + 3110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25856629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25856689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12928314 + 12928315.

It is an arithmetic number, because the mean of its divisors is an integer number (12928315).

Almost surely, 2^25856629 is an apocalyptic number.

It is an amenable number.

25856629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25856629 is an equidigital number, since it uses as much as digits as its factorization.

25856629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 43.

The square root of 25856629 is about 5084.9413959258. The cubic root of 25856629 is about 295.7040694981.

The spelling of 25856629 in words is "twenty-five million, eight hundred fifty-six thousand, six hundred twenty-nine".