25091212 has 12 divisors (see below), whose sum is σ = 44336656. Its totient is φ = 12423600.

The previous prime is 25091203. The next prime is 25091219. The reversal of 25091212 is 21219052.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25091219) 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, 30039 + ... + 30862.

Almost surely, 2^25091212 is an apocalyptic number.

It is an amenable number.

25091212 is a deficient number, since it is larger than the sum of its proper divisors (19245444).

25091212 is a wasteful number, since it uses less digits than its factorization.

25091212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61008 (or 61006 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 25091212 is about 5009.1128955135. The cubic root of 25091212 is about 292.7569495616.

It can be divided in two parts, 2509 and 1212, that added together give a square (3721 = 61²).

The spelling of 25091212 in words is "twenty-five million, ninety-one thousand, two hundred twelve".