25422012 has 120 divisors (see below), whose sum is σ = 82938240. Its totient is φ = 6596640.

The previous prime is 25421999. The next prime is 25422013. The reversal of 25422012 is 21022452.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422013) 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 39 ways as a sum of consecutive naturals, for example, 24439 + ... + 25457.

It is an arithmetic number, because the mean of its divisors is an integer number (691152).

Almost surely, 2^25422012 is an apocalyptic number.

25422012 is a gapful number since it is divisible by the number (22) 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 25422012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41469120).

25422012 is an abundant number, since it is smaller than the sum of its proper divisors (57516228).

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

25422012 is a wasteful number, since it uses less digits than its factorization.

25422012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25422012 is about 5042.0245933553. The cubic root of 25422012 is about 294.0378959897.

Adding to 25422012 its reverse (21022452), we get a palindrome (46444464).

It can be divided in two parts, 2542 and 2012, that added together give a palindrome (4554).

The spelling of 25422012 in words is "twenty-five million, four hundred twenty-two thousand, twelve".