25403013 has 6 divisors (see below), whose sum is σ = 36693254. Its totient is φ = 16935336.

The previous prime is 25402997. The next prime is 25403029. The reversal of 25403013 is 31030452.

It is an interprime number because it is at equal distance from previous prime (25402997) and next prime (25403029).

It can be written as a sum of positive squares in only one way, i.e., 13417569 + 11985444 = 3663^2 + 3462^2 .

It is not a de Polignac number, because 25403013 - 2⁴ = 25402997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1411270 + ... + 1411287.

Almost surely, 2^25403013 is an apocalyptic number.

It is an amenable number.

25403013 is a deficient number, since it is larger than the sum of its proper divisors (11290241).

25403013 is a wasteful number, since it uses less digits than its factorization.

25403013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822563 (or 2822560 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 25403013 is about 5040.1401766221. The cubic root of 25403013 is about 293.9646285365.

Adding to 25403013 its reverse (31030452), we get a palindrome (56433465).

The spelling of 25403013 in words is "twenty-five million, four hundred three thousand, thirteen".