25126961 has 2 divisors, whose sum is σ = 25126962. Its totient is φ = 25126960.

The previous prime is 25126951. The next prime is 25126991. The reversal of 25126961 is 16962152.

25126961 = 3544² + 3545².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 12559936 = 3545^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 25126961 - 2⁶ = 25126897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25126931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563480 + 12563481.

It is an arithmetic number, because the mean of its divisors is an integer number (12563481).

Almost surely, 2^25126961 is an apocalyptic number.

25126961 is the 3545-th centered square number.

It is an amenable number.

25126961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25126961 is an equidigital number, since it uses as much as digits as its factorization.

25126961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 25126961 is about 5012.6800217050. The cubic root of 25126961 is about 292.8959198873.

The spelling of 25126961 in words is "twenty-five million, one hundred twenty-six thousand, nine hundred sixty-one".