25451013 has 32 divisors (see below), whose sum is σ = 41149440. Its totient is φ = 13668480.

The previous prime is 25451011. The next prime is 25451053. The reversal of 25451013 is 31015452.

It is not a de Polignac number, because 25451013 - 2¹ = 25451011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25451011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90433 + ... + 90713.

It is an arithmetic number, because the mean of its divisors is an integer number (1285920).

Almost surely, 2^25451013 is an apocalyptic number.

It is an amenable number.

25451013 is a deficient number, since it is larger than the sum of its proper divisors (15698427).

25451013 is a wasteful number, since it uses less digits than its factorization.

25451013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537.

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

The square root of 25451013 is about 5044.8997016789. The cubic root of 25451013 is about 294.1496646470.

Adding to 25451013 its reverse (31015452), we get a palindrome (56466465).

The spelling of 25451013 in words is "twenty-five million, four hundred fifty-one thousand, thirteen".