25245731 has 12 divisors (see below), whose sum is σ = 31096008. Its totient is φ = 20365632.

The previous prime is 25245719. The next prime is 25245739. The reversal of 25245731 is 13754252.

It is a happy number.

It is not a de Polignac number, because 25245731 - 2²² = 21051427 is a prime.

It is a super-2 number, since 2×25245731² = 1274693867448722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25245694 and 25245703.

It is not an unprimeable number, because it can be changed into a prime (25245739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14321 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (2591334).

Almost surely, 2^25245731 is an apocalyptic number.

25245731 is a deficient number, since it is larger than the sum of its proper divisors (5850277).

25245731 is a wasteful number, since it uses less digits than its factorization.

25245731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30338 (or 30331 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 25245731 is about 5024.5130112281. The cubic root of 25245731 is about 293.3566810215.

Adding to 25245731 its reverse (13754252), we get a palindrome (38999983).

The spelling of 25245731 in words is "twenty-five million, two hundred forty-five thousand, seven hundred thirty-one".