25189139 has 8 divisors (see below), whose sum is σ = 26116560. Its totient is φ = 24265696.

The previous prime is 25189127. The next prime is 25189147. The reversal of 25189139 is 93198152.

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 25189139 - 2⁴ = 25189123 is a prime.

It is a super-2 number, since 2×25189139² = 1268985447122642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25189159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18992 + ... + 20274.

It is an arithmetic number, because the mean of its divisors is an integer number (3264570).

Almost surely, 2^25189139 is an apocalyptic number.

25189139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25189139 is a deficient number, since it is larger than the sum of its proper divisors (927421).

25189139 is a wasteful number, since it uses less digits than its factorization.

25189139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989.

The product of its digits is 19440, while the sum is 38.

The square root of 25189139 is about 5018.8782611257. The cubic root of 25189139 is about 293.1373163856.

The spelling of 25189139 in words is "twenty-five million, one hundred eighty-nine thousand, one hundred thirty-nine".