25461513 has 64 divisors (see below), whose sum is σ = 48445440. Its totient is φ = 12830400.

The previous prime is 25461511. The next prime is 25461517. The reversal of 25461513 is 31516452.

It is not a de Polignac number, because 25461513 - 2¹ = 25461511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25461511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76758 + ... + 77088.

It is an arithmetic number, because the mean of its divisors is an integer number (756960).

Almost surely, 2^25461513 is an apocalyptic number.

It is an amenable number.

25461513 is a deficient number, since it is larger than the sum of its proper divisors (22983927).

25461513 is a wasteful number, since it uses less digits than its factorization.

25461513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 389 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 25461513 is about 5045.9402493490. The cubic root of 25461513 is about 294.1901102780.

Adding to 25461513 its reverse (31516452), we get a palindrome (56977965).

The spelling of 25461513 in words is "twenty-five million, four hundred sixty-one thousand, five hundred thirteen".