25258613 has 4 divisors (see below), whose sum is σ = 25320780. Its totient is φ = 25196448.

The previous prime is 25258609. The next prime is 25258621. The reversal of 25258613 is 31685252.

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 13712209 + 11546404 = 3703^2 + 3398^2 .

It is a cyclic number.

It is not a de Polignac number, because 25258613 - 2² = 25258609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25258613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25258603) 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, 30470 + ... + 31287.

It is an arithmetic number, because the mean of its divisors is an integer number (6330195).

Almost surely, 2^25258613 is an apocalyptic number.

It is an amenable number.

25258613 is a deficient number, since it is larger than the sum of its proper divisors (62167).

25258613 is an equidigital number, since it uses as much as digits as its factorization.

25258613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62166.

The product of its digits is 14400, while the sum is 32.

The square root of 25258613 is about 5025.7947630201. The cubic root of 25258613 is about 293.4065690360.

The spelling of 25258613 in words is "twenty-five million, two hundred fifty-eight thousand, six hundred thirteen".