25420000 has 120 divisors (see below), whose sum is σ = 66128832. Its totient is φ = 9600000.

The previous prime is 25419971. The next prime is 25420007. The reversal of 25420000 is 2452.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 619980 + ... + 620020.

Almost surely, 2^25420000 is an apocalyptic number.

25420000 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 25420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33064416).

25420000 is an abundant number, since it is smaller than the sum of its proper divisors (40708832).

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

25420000 is an equidigital number, since it uses as much as digits as its factorization.

25420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 25420000 is about 5041.8250663822. The cubic root of 25420000 is about 294.0301386722.

Adding to 25420000 its reverse (2452), we get a palindrome (25422452).

The spelling of 25420000 in words is "twenty-five million, four hundred twenty thousand".