25249539 has 32 divisors (see below), whose sum is σ = 41181696. Its totient is φ = 13432320.

The previous prime is 25249519. The next prime is 25249541. The reversal of 25249539 is 93594252.

It is not a de Polignac number, because 25249539 - 2⁵ = 25249507 is a prime.

It is a super-3 number, since 3×25249539³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 25249497 and 25249506.

It is not an unprimeable number, because it can be changed into a prime (25249519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37869 + ... + 38529.

It is an arithmetic number, because the mean of its divisors is an integer number (1286928).

Almost surely, 2^25249539 is an apocalyptic number.

25249539 is a deficient number, since it is larger than the sum of its proper divisors (15932157).

25249539 is a wasteful number, since it uses less digits than its factorization.

25249539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 97200, while the sum is 39.

The square root of 25249539 is about 5024.8919391366. The cubic root of 25249539 is about 293.3714299980.

The spelling of 25249539 in words is "twenty-five million, two hundred forty-nine thousand, five hundred thirty-nine".