25025820 has 24 divisors (see below), whose sum is σ = 70072464. Its totient is φ = 6673536.

The previous prime is 25025809. The next prime is 25025827. The reversal of 25025820 is 2852052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025827) 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, 208489 + ... + 208608.

It is an arithmetic number, because the mean of its divisors is an integer number (2919686).

Almost surely, 2^25025820 is an apocalyptic number.

25025820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25025820 is an abundant number, since it is smaller than the sum of its proper divisors (45046644).

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

25025820 is a wasteful number, since it uses less digits than its factorization.

25025820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417109 (or 417107 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 25025820 is about 5002.5813336716. The cubic root of 25025820 is about 292.5024033698.

Adding to 25025820 its reverse (2852052), we get a palindrome (27877872).

It can be divided in two parts, 250258 and 20, that added together give a triangular number (250278 = T₇₀₇).

The spelling of 25025820 in words is "twenty-five million, twenty-five thousand, eight hundred twenty".