25857413 has 4 divisors (see below), whose sum is σ = 26556300. Its totient is φ = 25158528.

The previous prime is 25857409. The next prime is 25857421. The reversal of 25857413 is 31475852.

It is a happy number.

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 14010049 + 11847364 = 3743^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 25857413 - 2² = 25857409 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 (25859413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349388 + ... + 349461.

It is an arithmetic number, because the mean of its divisors is an integer number (6639075).

Almost surely, 2^25857413 is an apocalyptic number.

It is an amenable number.

25857413 is a deficient number, since it is larger than the sum of its proper divisors (698887).

25857413 is an equidigital number, since it uses as much as digits as its factorization.

25857413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698886.

The product of its digits is 33600, while the sum is 35.

The square root of 25857413 is about 5085.0184857088. The cubic root of 25857413 is about 295.7070581533.

The spelling of 25857413 in words is "twenty-five million, eight hundred fifty-seven thousand, four hundred thirteen".