25918641 has 48 divisors (see below), whose sum is σ = 45926400. Its totient is φ = 13755744.

The previous prime is 25918639. The next prime is 25918649. The reversal of 25918641 is 14681952.

25918641 is a `hidden beast` number, since 2 + 5 + 9 + 1 + 8 + 641 = 666.

It is not a de Polignac number, because 25918641 - 2¹ = 25918639 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25918596 and 25918605.

It is not an unprimeable number, because it can be changed into a prime (25918649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70440 + ... + 70806.

It is an arithmetic number, because the mean of its divisors is an integer number (956800).

Almost surely, 2^25918641 is an apocalyptic number.

25918641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25918641 is a deficient number, since it is larger than the sum of its proper divisors (20007759).

25918641 is a wasteful number, since it uses less digits than its factorization.

25918641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 455 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 25918641 is about 5091.0353563887. The cubic root of 25918641 is about 295.9402766345.

The spelling of 25918641 in words is "twenty-five million, nine hundred eighteen thousand, six hundred forty-one".