25425220 has 24 divisors (see below), whose sum is σ = 53601408. Its totient is φ = 10130400.

The previous prime is 25425209. The next prime is 25425223. The reversal of 25425220 is 2252452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25425191 and 25425200.

It is not an unprimeable number, because it can be changed into a prime (25425223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3075 + ... + 7765.

It is an arithmetic number, because the mean of its divisors is an integer number (2233392).

Almost surely, 2^25425220 is an apocalyptic number.

25425220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25425220 is an abundant number, since it is smaller than the sum of its proper divisors (28176188).

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

25425220 is a wasteful number, since it uses less digits than its factorization.

25425220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971 (or 4969 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25425220 is about 5042.3427094953. The cubic root of 25425220 is about 294.0502636693.

Adding to 25425220 its reverse (2252452), we get a palindrome (27677672).

The spelling of 25425220 in words is "twenty-five million, four hundred twenty-five thousand, two hundred twenty".