25959421 has 2 divisors, whose sum is σ = 25959422. Its totient is φ = 25959420.

The previous prime is 25959407. The next prime is 25959443. The reversal of 25959421 is 12495952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 6502500 = 4411^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 25959421 - 2⁵ = 25959389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25959721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12979710 + 12979711.

It is an arithmetic number, because the mean of its divisors is an integer number (12979711).

Almost surely, 2^25959421 is an apocalyptic number.

It is an amenable number.

25959421 is a deficient number, since it is larger than the sum of its proper divisors (1).

25959421 is an equidigital number, since it uses as much as digits as its factorization.

25959421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 25959421 is about 5095.0388614808. The cubic root of 25959421 is about 296.0954046313.

The spelling of 25959421 in words is "twenty-five million, nine hundred fifty-nine thousand, four hundred twenty-one".