25471239 has 4 divisors (see below), whose sum is σ = 33961656. Its totient is φ = 16980824.

The previous prime is 25471223. The next prime is 25471241. The reversal of 25471239 is 93217452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25471239 - 2⁴ = 25471223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25471249) 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, 4245204 + ... + 4245209.

It is an arithmetic number, because the mean of its divisors is an integer number (8490414).

Almost surely, 2^25471239 is an apocalyptic number.

25471239 is a deficient number, since it is larger than the sum of its proper divisors (8490417).

25471239 is an equidigital number, since it uses as much as digits as its factorization.

25471239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490416.

The product of its digits is 15120, while the sum is 33.

The square root of 25471239 is about 5046.9039023940. The cubic root of 25471239 is about 294.2275645691.

The spelling of 25471239 in words is "twenty-five million, four hundred seventy-one thousand, two hundred thirty-nine".