25045220 has 24 divisors (see below), whose sum is σ = 52731000. Its totient is φ = 9992192.

The previous prime is 25045213. The next prime is 25045243. The reversal of 25045220 is 2254052.

It can be written as a sum of positive squares in 4 ways, for example, as 4596736 + 20448484 = 2144^2 + 4522^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25045192 and 25045201.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7586 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (2197125).

Almost surely, 2^25045220 is an apocalyptic number.

25045220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25045220 is an abundant number, since it is smaller than the sum of its proper divisors (27685780).

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

25045220 is a wasteful number, since it uses less digits than its factorization.

25045220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247 (or 3245 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 25045220 is about 5004.5199569989. The cubic root of 25045220 is about 292.5779664077.

Adding to 25045220 its reverse (2254052), we get a palindrome (27299272).

The spelling of 25045220 in words is "twenty-five million, forty-five thousand, two hundred twenty".