25072187 has 4 divisors (see below), whose sum is σ = 28653936. Its totient is φ = 21490440.

The previous prime is 25072163. The next prime is 25072189. The reversal of 25072187 is 78127052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25072187 - 2⁶ = 25072123 is a prime.

It is a super-2 number, since 2×25072187² = 1257229121925938, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25072189) 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, 1790864 + ... + 1790877.

It is an arithmetic number, because the mean of its divisors is an integer number (7163484).

Almost surely, 2^25072187 is an apocalyptic number.

25072187 is a deficient number, since it is larger than the sum of its proper divisors (3581749).

25072187 is an equidigital number, since it uses as much as digits as its factorization.

25072187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581748.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 25072187 is about 5007.2134965468. The cubic root of 25072187 is about 292.6829381339.

The spelling of 25072187 in words is "twenty-five million, seventy-two thousand, one hundred eighty-seven".