25626981 has 8 divisors (see below), whose sum is σ = 35347680. Its totient is φ = 16495472.

The previous prime is 25626967. The next prime is 25627001. The reversal of 25626981 is 18962652.

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 25626981 - 2⁶ = 25626917 is a prime.

It is a super-2 number, since 2×25626981² = 1313484310348722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25626911) 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 7 ways as a sum of consecutive naturals, for example, 147195 + ... + 147368.

It is an arithmetic number, because the mean of its divisors is an integer number (4418460).

Almost surely, 2^25626981 is an apocalyptic number.

It is an amenable number.

25626981 is a deficient number, since it is larger than the sum of its proper divisors (9720699).

25626981 is a wasteful number, since it uses less digits than its factorization.

25626981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294595.

The product of its digits is 51840, while the sum is 39.

The square root of 25626981 is about 5062.3098482807. The cubic root of 25626981 is about 294.8260240100.

The spelling of 25626981 in words is "twenty-five million, six hundred twenty-six thousand, nine hundred eighty-one".