25781412 has 12 divisors (see below), whose sum is σ = 60156656. Its totient is φ = 8593800.

The previous prime is 25781411. The next prime is 25781417. The reversal of 25781412 is 21418752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25781412.

It is not an unprimeable number, because it can be changed into a prime (25781411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074214 + ... + 1074237.

Almost surely, 2^25781412 is an apocalyptic number.

It is an amenable number.

25781412 is an abundant number, since it is smaller than the sum of its proper divisors (34375244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25781412 is a wasteful number, since it uses less digits than its factorization.

25781412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148458 (or 2148456 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 25781412 is about 5077.5399555296. The cubic root of 25781412 is about 295.4170563787.

The spelling of 25781412 in words is "twenty-five million, seven hundred eighty-one thousand, four hundred twelve".