25138457 has 8 divisors (see below), whose sum is σ = 25417920. Its totient is φ = 24860880.

The previous prime is 25138439. The next prime is 25138481. The reversal of 25138457 is 75483152.

It is a happy number.

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 25138457 - 2²⁰ = 24089881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25038457) 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, 57044 + ... + 57482.

It is an arithmetic number, because the mean of its divisors is an integer number (3177240).

Almost surely, 2^25138457 is an apocalyptic number.

It is an amenable number.

25138457 is a deficient number, since it is larger than the sum of its proper divisors (279463).

25138457 is a wasteful number, since it uses less digits than its factorization.

25138457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its digits is 33600, while the sum is 35.

The square root of 25138457 is about 5013.8265825615. The cubic root of 25138457 is about 292.9405813185.

The spelling of 25138457 in words is "twenty-five million, one hundred thirty-eight thousand, four hundred fifty-seven".