25138399 has 16 divisors (see below), whose sum is σ = 29675520. Its totient is φ = 20993760.

The previous prime is 25138391. The next prime is 25138439. The reversal of 25138399 is 99383152.

It is a cyclic number.

It is not a de Polignac number, because 25138399 - 2³ = 25138391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52242 + ... + 52720.

It is an arithmetic number, because the mean of its divisors is an integer number (1854720).

Almost surely, 2^25138399 is an apocalyptic number.

25138399 is a deficient number, since it is larger than the sum of its proper divisors (4537121).

25138399 is a wasteful number, since it uses less digits than its factorization.

25138399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 58320, while the sum is 40.

The square root of 25138399 is about 5013.8207985527. The cubic root of 25138399 is about 292.9403560253.

The spelling of 25138399 in words is "twenty-five million, one hundred thirty-eight thousand, three hundred ninety-nine".