25440961 has 8 divisors (see below), whose sum is σ = 31312064. Its totient is φ = 20129040.

The previous prime is 25440929. The next prime is 25440973. The reversal of 25440961 is 16904452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25440961 - 2⁵ = 25440929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25440061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139695 + ... + 139876.

It is an arithmetic number, because the mean of its divisors is an integer number (3914008).

Almost surely, 2^25440961 is an apocalyptic number.

It is an amenable number.

25440961 is a deficient number, since it is larger than the sum of its proper divisors (5871103).

25440961 is a wasteful number, since it uses less digits than its factorization.

25440961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279591.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25440961 is about 5043.9033495895. The cubic root of 25440961 is about 294.1109342727.

The spelling of 25440961 in words is "twenty-five million, four hundred forty thousand, nine hundred sixty-one".