25731425 has 12 divisors (see below), whose sum is σ = 31970796. Its totient is φ = 20544000.

The previous prime is 25731403. The next prime is 25731437. The reversal of 25731425 is 52413752.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1682209 + 24049216 = 1297^2 + 4904^2 .

It is not a de Polignac number, because 25731425 - 2¹² = 25727329 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20825 + ... + 22025.

It is an arithmetic number, because the mean of its divisors is an integer number (2664233).

Almost surely, 2^25731425 is an apocalyptic number.

25731425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25731425 is a deficient number, since it is larger than the sum of its proper divisors (6239371).

25731425 is a wasteful number, since it uses less digits than its factorization.

25731425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2063 counting only the distinct ones).

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

The square root of 25731425 is about 5072.6152032260. The cubic root of 25731425 is about 295.2260070225.

The spelling of 25731425 in words is "twenty-five million, seven hundred thirty-one thousand, four hundred twenty-five".