25422140 has 24 divisors (see below), whose sum is σ = 56527632. Its totient is φ = 9570560.

The previous prime is 25422113. The next prime is 25422149. The reversal of 25422140 is 4122452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422149) 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 7 ways as a sum of consecutive naturals, for example, 37046 + ... + 37725.

It is an arithmetic number, because the mean of its divisors is an integer number (2355318).

Almost surely, 2^25422140 is an apocalyptic number.

25422140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25422140 is an abundant number, since it is smaller than the sum of its proper divisors (31105492).

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

25422140 is a wasteful number, since it uses less digits than its factorization.

25422140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74797 (or 74795 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25422140 is about 5042.0372866531. The cubic root of 25422140 is about 294.0383894831.

Adding to 25422140 its reverse (4122452), we get a palindrome (29544592).

The spelling of 25422140 in words is "twenty-five million, four hundred twenty-two thousand, one hundred forty".