25244420 has 12 divisors (see below), whose sum is σ = 53013324. Its totient is φ = 10097760.

The previous prime is 25244419. The next prime is 25244431. The reversal of 25244420 is 2444252.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 15856324 = 3064^2 + 3982^2 .

It is a super-2 number, since 2×25244420² = 1274561482272800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

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, 631091 + ... + 631130.

It is an arithmetic number, because the mean of its divisors is an integer number (4417777).

Almost surely, 2^25244420 is an apocalyptic number.

25244420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25244420 is an abundant number, since it is smaller than the sum of its proper divisors (27768904).

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

25244420 is a wasteful number, since it uses less digits than its factorization.

25244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262230 (or 1262228 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 25244420 is about 5024.3825491298. The cubic root of 25244420 is about 293.3516029714.

Adding to 25244420 its reverse (2444252), we get a palindrome (27688672).

The spelling of 25244420 in words is "twenty-five million, two hundred forty-four thousand, four hundred twenty".