25138009 has 8 divisors (see below), whose sum is σ = 27236160. Its totient is φ = 23063376.

The previous prime is 25137989. The next prime is 25138013. The reversal of 25138009 is 90083152.

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 25138009 - 2⁵ = 25137977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25138049) 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, 3619 + ... + 7960.

It is an arithmetic number, because the mean of its divisors is an integer number (3404520).

Almost surely, 2^25138009 is an apocalyptic number.

It is an amenable number.

25138009 is a deficient number, since it is larger than the sum of its proper divisors (2098151).

25138009 is a wasteful number, since it uses less digits than its factorization.

25138009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11759.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 25138009 is about 5013.7819059070. The cubic root of 25138009 is about 292.9388411141.

The spelling of 25138009 in words is "twenty-five million, one hundred thirty-eight thousand, nine".