25650239 has 4 divisors (see below), whose sum is σ = 26534760. Its totient is φ = 24765720.

The previous prime is 25650217. The next prime is 25650259. The reversal of 25650239 is 93205652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25650239 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 (25650259) 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, 442217 + ... + 442274.

It is an arithmetic number, because the mean of its divisors is an integer number (6633690).

Almost surely, 2^25650239 is an apocalyptic number.

25650239 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25650239 is a deficient number, since it is larger than the sum of its proper divisors (884521).

25650239 is an equidigital number, since it uses as much as digits as its factorization.

25650239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884520.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 25650239 is about 5064.6065000156. The cubic root of 25650239 is about 294.9151877227.

The spelling of 25650239 in words is "twenty-five million, six hundred fifty thousand, two hundred thirty-nine".