25849239 has 16 divisors (see below), whose sum is σ = 37504992. Its totient is φ = 15740928.

The previous prime is 25849223. The next prime is 25849247. The reversal of 25849239 is 93294852.

It is not a de Polignac number, because 25849239 - 2⁴ = 25849223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25849239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25849289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (2344062).

Almost surely, 2^25849239 is an apocalyptic number.

25849239 is a deficient number, since it is larger than the sum of its proper divisors (11655753).

25849239 is a wasteful number, since it uses less digits than its factorization.

25849239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946.

The product of its digits is 155520, while the sum is 42.

The square root of 25849239 is about 5084.2146886220. The cubic root of 25849239 is about 295.6758954040.

The spelling of 25849239 in words is "twenty-five million, eight hundred forty-nine thousand, two hundred thirty-nine".