25122513 has 16 divisors (see below), whose sum is σ = 36221696. Its totient is φ = 15396480.

The previous prime is 25122491. The next prime is 25122527. The reversal of 25122513 is 31522152.

It is not a de Polignac number, because 25122513 - 2¹² = 25118417 is a prime.

It is a super-2 number, since 2×25122513² = 1262281318870338, which contains 22 as substring.

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 25122513.

It is not an unprimeable number, because it can be changed into a prime (25122533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9381 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (2263856).

Almost surely, 2^25122513 is an apocalyptic number.

It is an amenable number.

25122513 is a deficient number, since it is larger than the sum of its proper divisors (11099183).

25122513 is a wasteful number, since it uses less digits than its factorization.

25122513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 600, while the sum is 21.

The square root of 25122513 is about 5012.2363272296. The cubic root of 25122513 is about 292.8786359569.

Adding to 25122513 its reverse (31522152), we get a palindrome (56644665).

The spelling of 25122513 in words is "twenty-five million, one hundred twenty-two thousand, five hundred thirteen".