25171157 has 4 divisors (see below), whose sum is σ = 27459456. Its totient is φ = 22882860.

The previous prime is 25171151. The next prime is 25171183. The reversal of 25171157 is 75117152.

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 25171157 - 2¹² = 25167061 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 (25171151) 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, 1144133 + ... + 1144154.

It is an arithmetic number, because the mean of its divisors is an integer number (6864864).

Almost surely, 2^25171157 is an apocalyptic number.

It is an amenable number.

25171157 is a deficient number, since it is larger than the sum of its proper divisors (2288299).

25171157 is a wasteful number, since it uses less digits than its factorization.

25171157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288298.

The product of its digits is 2450, while the sum is 29.

The square root of 25171157 is about 5017.0865051342. The cubic root of 25171157 is about 293.0675449119.

The spelling of 25171157 in words is "twenty-five million, one hundred seventy-one thousand, one hundred fifty-seven".