25942513 has 8 divisors (see below), whose sum is σ = 26745768. Its totient is φ = 25144704.

The previous prime is 25942487. The next prime is 25942517. The reversal of 25942513 is 31524952.

It can be written as a sum of positive squares in 4 ways, for example, as 7683984 + 18258529 = 2772^2 + 4273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25942513 - 2¹⁷ = 25811441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25942517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9645 + ... + 12037.

It is an arithmetic number, because the mean of its divisors is an integer number (3343221).

Almost surely, 2^25942513 is an apocalyptic number.

It is an amenable number.

25942513 is a deficient number, since it is larger than the sum of its proper divisors (803255).

25942513 is a wasteful number, since it uses less digits than its factorization.

25942513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723.

The product of its digits is 10800, while the sum is 31.

The square root of 25942513 is about 5093.3793300715. The cubic root of 25942513 is about 296.0311059653.

The spelling of 25942513 in words is "twenty-five million, nine hundred forty-two thousand, five hundred thirteen".