25402859 has 2 divisors, whose sum is σ = 25402860. Its totient is φ = 25402858.

The previous prime is 25402837. The next prime is 25402873. The reversal of 25402859 is 95820452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25402859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25402459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12701429 + 12701430.

It is an arithmetic number, because the mean of its divisors is an integer number (12701430).

Almost surely, 2^25402859 is an apocalyptic number.

25402859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25402859 is an equidigital number, since it uses as much as digits as its factorization.

25402859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 25402859 is about 5040.1248992460. The cubic root of 25402859 is about 293.9640345040.

The spelling of 25402859 in words is "twenty-five million, four hundred two thousand, eight hundred fifty-nine".