25421442 has 32 divisors (see below), whose sum is σ = 52527552. Its totient is φ = 8195904.

The previous prime is 25421423. The next prime is 25421453. The reversal of 25421442 is 24412452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67968 + ... + 68340.

It is an arithmetic number, because the mean of its divisors is an integer number (1641486).

Almost surely, 2^25421442 is an apocalyptic number.

25421442 is an abundant number, since it is smaller than the sum of its proper divisors (27106110).

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

25421442 is a wasteful number, since it uses less digits than its factorization.

25421442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its digits is 2560, while the sum is 24.

The square root of 25421442 is about 5041.9680681258. The cubic root of 25421442 is about 294.0356983817.

Adding to 25421442 its reverse (24412452), we get a palindrome (49833894).

The spelling of 25421442 in words is "twenty-five million, four hundred twenty-one thousand, four hundred forty-two".