25955921 has 2 divisors, whose sum is σ = 25955922. Its totient is φ = 25955920.

The previous prime is 25955903. The next prime is 25955933. The reversal of 25955921 is 12955952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15484225 + 10471696 = 3935^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 25955921 - 2²² = 21761617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25955521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12977960 + 12977961.

It is an arithmetic number, because the mean of its divisors is an integer number (12977961).

Almost surely, 2^25955921 is an apocalyptic number.

It is an amenable number.

25955921 is a deficient number, since it is larger than the sum of its proper divisors (1).

25955921 is an equidigital number, since it uses as much as digits as its factorization.

25955921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 38.

The square root of 25955921 is about 5094.6953785285. The cubic root of 25955921 is about 296.0820969321.

The spelling of 25955921 in words is "twenty-five million, nine hundred fifty-five thousand, nine hundred twenty-one".