25740931 has 4 divisors (see below), whose sum is σ = 26125192. Its totient is φ = 25356672.

The previous prime is 25740917. The next prime is 25740947. The reversal of 25740931 is 13904752.

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

It is a cyclic number.

It is not a de Polignac number, because 25740931 - 2⁵ = 25740899 is a prime.

It is a super-2 number, since 2×25740931² = 1325191057493522, 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 = 25740893 and 25740902.

It is not an unprimeable number, because it can be changed into a prime (25740031) 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, 192030 + ... + 192163.

It is an arithmetic number, because the mean of its divisors is an integer number (6531298).

Almost surely, 2^25740931 is an apocalyptic number.

25740931 is a deficient number, since it is larger than the sum of its proper divisors (384261).

25740931 is an equidigital number, since it uses as much as digits as its factorization.

25740931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384260.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 25740931 is about 5073.5521087301. The cubic root of 25740931 is about 295.2623578127.

The spelling of 25740931 in words is "twenty-five million, seven hundred forty thousand, nine hundred thirty-one".