25220004 has 12 divisors (see below), whose sum is σ = 58846704. Its totient is φ = 8406664.

The previous prime is 25219991. The next prime is 25220033. The reversal of 25220004 is 40002252.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050822 + ... + 1050845.

It is an arithmetic number, because the mean of its divisors is an integer number (4903892).

Almost surely, 2^25220004 is an apocalyptic number.

It is an amenable number.

25220004 is an abundant number, since it is smaller than the sum of its proper divisors (33626700).

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

25220004 is a wasteful number, since it uses less digits than its factorization.

25220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101674 (or 2101672 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 25220004 is about 5021.9522100474. The cubic root of 25220004 is about 293.2569974688.

Adding to 25220004 its reverse (40002252), we get a palindrome (65222256).

The spelling of 25220004 in words is "twenty-five million, two hundred twenty thousand, four".