25401204 has 36 divisors (see below), whose sum is σ = 65424996. Its totient is φ = 8306688.

The previous prime is 25401199. The next prime is 25401209. The reversal of 25401204 is 40210452.

25401204 is a `hidden beast` number, since 2 + 540 + 120 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (25401199) and next prime (25401209).

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 11696400 = 3702^2 + 3420^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25401209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4749 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1817361).

Almost surely, 2^25401204 is an apocalyptic number.

It is an amenable number.

25401204 is an abundant number, since it is smaller than the sum of its proper divisors (40023792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25401204 is a wasteful number, since it uses less digits than its factorization.

25401204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13376 (or 13371 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25401204 is about 5039.9607141326. The cubic root of 25401204 is about 293.9576504320.

Adding to 25401204 its reverse (40210452), we get a palindrome (65611656).

The spelling of 25401204 in words is "twenty-five million, four hundred one thousand, two hundred four".