25432613 has 4 divisors (see below), whose sum is σ = 25443180. Its totient is φ = 25422048.

The previous prime is 25432609. The next prime is 25432619. The reversal of 25432613 is 31623452.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2411809 + 23020804 = 1553^2 + 4798^2 .

It is a cyclic number.

It is not a de Polignac number, because 25432613 - 2² = 25432609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25432619) 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, 281 + ... + 7137.

It is an arithmetic number, because the mean of its divisors is an integer number (6360795).

Almost surely, 2^25432613 is an apocalyptic number.

It is an amenable number.

25432613 is a deficient number, since it is larger than the sum of its proper divisors (10567).

25432613 is an equidigital number, since it uses as much as digits as its factorization.

25432613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10566.

The product of its digits is 4320, while the sum is 26.

The square root of 25432613 is about 5043.0757479935. The cubic root of 25432613 is about 294.0787616584.

The spelling of 25432613 in words is "twenty-five million, four hundred thirty-two thousand, six hundred thirteen".