18751225 has 12 divisors (see below), whose sum is σ = 23793616. Its totient is φ = 14651280.

The previous prime is 18751219. The next prime is 18751231. The reversal of 18751225 is 52215781.

It is an interprime number because it is at equal distance from previous prime (18751219) and next prime (18751231).

It is not a de Polignac number, because 18751225 - 2⁹ = 18750713 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7647 + ... + 9796.

Almost surely, 2^18751225 is an apocalyptic number.

It is an amenable number.

18751225 is a deficient number, since it is larger than the sum of its proper divisors (5042391).

18751225 is a wasteful number, since it uses less digits than its factorization.

18751225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17496 (or 17491 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 18751225 is about 4330.2684674279. The cubic root of 18751225 is about 265.6704277552.

The spelling of 18751225 in words is "eighteen million, seven hundred fifty-one thousand, two hundred twenty-five".