22420425 has 24 divisors (see below), whose sum is σ = 37256544. Its totient is φ = 11896960.

The previous prime is 22420421. The next prime is 22420427. The reversal of 22420425 is 52402422.

It is not a de Polignac number, because 22420425 - 2² = 22420421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22420421) 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 23 ways as a sum of consecutive naturals, for example, 16834 + ... + 18116.

It is an arithmetic number, because the mean of its divisors is an integer number (1552356).

Almost surely, 2^22420425 is an apocalyptic number.

22420425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22420425 is a deficient number, since it is larger than the sum of its proper divisors (14836119).

22420425 is a wasteful number, since it uses less digits than its factorization.

22420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22420425 is about 4735.0211192771. The cubic root of 22420425 is about 281.9776024664.

Adding to 22420425 its reverse (52402422), we get a palindrome (74822847).

The spelling of 22420425 in words is "twenty-two million, four hundred twenty thousand, four hundred twenty-five".