25452981 has 16 divisors (see below), whose sum is σ = 39009600. Its totient is φ = 16383024.

The previous prime is 25452967. The next prime is 25453009. The reversal of 25452981 is 18925452.

25452981 is a `hidden beast` number, since 2 + 54 + 529 + 81 = 666.

It is not a de Polignac number, because 25452981 - 2¹¹ = 25450933 is a prime.

It is a super-2 number, since 2×25452981² = 1295708483572722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25452941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15471 + ... + 17036.

It is an arithmetic number, because the mean of its divisors is an integer number (2438100).

Almost surely, 2^25452981 is an apocalyptic number.

It is an amenable number.

25452981 is a deficient number, since it is larger than the sum of its proper divisors (13556619).

25452981 is a wasteful number, since it uses less digits than its factorization.

25452981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32545 (or 32539 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 25452981 is about 5045.0947463848. The cubic root of 25452981 is about 294.1572461608.

It can be divided in two parts, 254 and 52981, that added together give a palindrome (53235).

The spelling of 25452981 in words is "twenty-five million, four hundred fifty-two thousand, nine hundred eighty-one".