25761431 has 4 divisors (see below), whose sum is σ = 25794552. Its totient is φ = 25728312.

The previous prime is 25761391. The next prime is 25761451. The reversal of 25761431 is 13416752.

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 25761431 - 2¹⁰ = 25760407 is a prime.

It is a super-2 number, since 2×25761431² = 1327302654335522, 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 = 25761394 and 25761403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25761451) 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, 15365 + ... + 16958.

It is an arithmetic number, because the mean of its divisors is an integer number (6448638).

Almost surely, 2^25761431 is an apocalyptic number.

25761431 is a deficient number, since it is larger than the sum of its proper divisors (33121).

25761431 is an equidigital number, since it uses as much as digits as its factorization.

25761431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33120.

The product of its digits is 5040, while the sum is 29.

The square root of 25761431 is about 5075.5719874710. The cubic root of 25761431 is about 295.3407190320.

The spelling of 25761431 in words is "twenty-five million, seven hundred sixty-one thousand, four hundred thirty-one".