25731841 has 4 divisors (see below), whose sum is σ = 25813332. Its totient is φ = 25650352.

The previous prime is 25731809. The next prime is 25731859. The reversal of 25731841 is 14813752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3594816 + 22137025 = 1896^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 25731841 - 2⁵ = 25731809 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25732841) 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, 40270 + ... + 40903.

It is an arithmetic number, because the mean of its divisors is an integer number (6453333).

Almost surely, 2^25731841 is an apocalyptic number.

It is an amenable number.

25731841 is a deficient number, since it is larger than the sum of its proper divisors (81491).

25731841 is an equidigital number, since it uses as much as digits as its factorization.

25731841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81490.

The product of its digits is 6720, while the sum is 31.

The square root of 25731841 is about 5072.6562075504. The cubic root of 25731841 is about 295.2275979870.

The spelling of 25731841 in words is "twenty-five million, seven hundred thirty-one thousand, eight hundred forty-one".