25502457 has 4 divisors (see below), whose sum is σ = 34003280. Its totient is φ = 17001636.

The previous prime is 25502443. The next prime is 25502459. The reversal of 25502457 is 75420552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25502457 - 2²⁰ = 24453881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25502459) 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, 4250407 + ... + 4250412.

It is an arithmetic number, because the mean of its divisors is an integer number (8500820).

Almost surely, 2^25502457 is an apocalyptic number.

It is an amenable number.

25502457 is a deficient number, since it is larger than the sum of its proper divisors (8500823).

25502457 is an equidigital number, since it uses as much as digits as its factorization.

25502457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500822.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 25502457 is about 5049.9957425725. The cubic root of 25502457 is about 294.3477189931.

The spelling of 25502457 in words is "twenty-five million, five hundred two thousand, four hundred fifty-seven".