25715289 has 8 divisors (see below), whose sum is σ = 34620352. Its totient is φ = 16976880.

The previous prime is 25715279. The next prime is 25715293. The reversal of 25715289 is 98251752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25715289 - 2⁴ = 25715273 is a prime.

It is a super-2 number, since 2×25715289² = 1322552176707042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25715269) 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, 41302 + ... + 41919.

It is an arithmetic number, because the mean of its divisors is an integer number (4327544).

Almost surely, 2^25715289 is an apocalyptic number.

It is an amenable number.

25715289 is a deficient number, since it is larger than the sum of its proper divisors (8905063).

25715289 is a wasteful number, since it uses less digits than its factorization.

25715289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83327.

The product of its digits is 50400, while the sum is 39.

The square root of 25715289 is about 5071.0244527117. The cubic root of 25715289 is about 295.1642827175.

The spelling of 25715289 in words is "twenty-five million, seven hundred fifteen thousand, two hundred eighty-nine".