25403513 has 4 divisors (see below), whose sum is σ = 26740560. Its totient is φ = 24066468.

The previous prime is 25403503. The next prime is 25403533. The reversal of 25403513 is 31530452.

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 a cyclic number.

It is not a de Polignac number, because 25403513 - 2¹⁴ = 25387129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25403503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668495 + ... + 668532.

It is an arithmetic number, because the mean of its divisors is an integer number (6685140).

Almost surely, 2^25403513 is an apocalyptic number.

It is an amenable number.

25403513 is a deficient number, since it is larger than the sum of its proper divisors (1337047).

25403513 is a wasteful number, since it uses less digits than its factorization.

25403513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337046.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25403513 is about 5040.1897781730. The cubic root of 25403513 is about 293.9665571968.

Adding to 25403513 its reverse (31530452), we get a palindrome (56933965).

The spelling of 25403513 in words is "twenty-five million, four hundred three thousand, five hundred thirteen".