25422540 has 96 divisors (see below), whose sum is σ = 83655936. Its totient is φ = 5687040.

The previous prime is 25422533. The next prime is 25422541. The reversal of 25422540 is 4522452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25422540.

It is not an unprimeable number, because it can be changed into a prime (25422541) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7099 + ... + 10061.

It is an arithmetic number, because the mean of its divisors is an integer number (871416).

Almost surely, 2^25422540 is an apocalyptic number.

25422540 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 25422540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41827968).

25422540 is an abundant number, since it is smaller than the sum of its proper divisors (58233396).

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

25422540 is a wasteful number, since it uses less digits than its factorization.

25422540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999 (or 2997 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25422540 is about 5042.0769530026. The cubic root of 25422540 is about 294.0399316394.

Adding to 25422540 its reverse (4522452), we get a palindrome (29944992).

The spelling of 25422540 in words is "twenty-five million, four hundred twenty-two thousand, five hundred forty".