25001013 has 4 divisors (see below), whose sum is σ = 33334688. Its totient is φ = 16667340.

The previous prime is 25000991. The next prime is 25001029. The reversal of 25001013 is 31010052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25001013 - 2⁵ = 25000981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25001813) 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, 4166833 + ... + 4166838.

It is an arithmetic number, because the mean of its divisors is an integer number (8333672).

Almost surely, 2^25001013 is an apocalyptic number.

It is an amenable number.

25001013 is a deficient number, since it is larger than the sum of its proper divisors (8333675).

25001013 is an equidigital number, since it uses as much as digits as its factorization.

25001013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333674.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 25001013 is about 5000.1012989739. The cubic root of 25001013 is about 292.4057231412.

Adding to 25001013 its reverse (31010052), we get a palindrome (56011065).

The spelling of 25001013 in words is "twenty-five million, one thousand, thirteen".