42220425 has 36 divisors (see below), whose sum is σ = 75609744. Its totient is φ = 20779200.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220425 is 52402224.

It is not a de Polignac number, because 42220425 - 2⁵ = 42220393 is a prime.

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 35 ways as a sum of consecutive naturals, for example, 11010 + ... + 14340.

Almost surely, 2^42220425 is an apocalyptic number.

It is an amenable number.

42220425 is a deficient number, since it is larger than the sum of its proper divisors (33389319).

42220425 is a wasteful number, since it uses less digits than its factorization.

42220425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3352 counting only the distinct ones).

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

The square root of 42220425 is about 6497.7246017356. The cubic root of 42220425 is about 348.2097015270.

Adding to 42220425 its reverse (52402224), we get a palindrome (94622649).

The spelling of 42220425 in words is "forty-two million, two hundred twenty thousand, four hundred twenty-five".