25949961 has 12 divisors (see below), whose sum is σ = 37834992. Its totient is φ = 17137656.

The previous prime is 25949933. The next prime is 25949977. The reversal of 25949961 is 16994952.

It is not a de Polignac number, because 25949961 - 2⁶ = 25949897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25949981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12511 + ... + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (3152916).

Almost surely, 2^25949961 is an apocalyptic number.

It is an amenable number.

25949961 is a deficient number, since it is larger than the sum of its proper divisors (11885031).

25949961 is a wasteful number, since it uses less digits than its factorization.

25949961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27060 (or 27057 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 25949961 is about 5094.1104228314. The cubic root of 25949961 is about 296.0594330682.

It can be divided in two parts, 259499 and 61, that added together give a triangular number (259560 = T₇₂₀).

The spelling of 25949961 in words is "twenty-five million, nine hundred forty-nine thousand, nine hundred sixty-one".