25420500 has 192 divisors, whose sum is σ = 94348800. Its totient is φ = 5788800.

The previous prime is 25420477. The next prime is 25420511. The reversal of 25420500 is 502452.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94366 + ... + 94634.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^25420500 is an apocalyptic number.

25420500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25420500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47174400).

25420500 is an abundant number, since it is smaller than the sum of its proper divisors (68928300).

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

25420500 is a wasteful number, since it uses less digits than its factorization.

25420500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 25420500 is about 5041.8746513574. The cubic root of 25420500 is about 294.0320664732.

Adding to 25420500 its reverse (502452), we get a palindrome (25922952).

The spelling of 25420500 in words is "twenty-five million, four hundred twenty thousand, five hundred".