422440621 has 8 divisors (see below), whose sum is σ = 425977344. Its totient is φ = 418918080.

The previous prime is 422440549. The next prime is 422440637. The reversal of 422440621 is 126044224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 422440621 - 2⁷ = 422440493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422440691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61086 + ... + 67648.

It is an arithmetic number, because the mean of its divisors is an integer number (53247168).

Almost surely, 2^422440621 is an apocalyptic number.

It is an amenable number.

422440621 is a deficient number, since it is larger than the sum of its proper divisors (3536723).

422440621 is a wasteful number, since it uses less digits than its factorization.

422440621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 422440621 is about 20553.3603335318. The cubic root of 422440621 is about 750.3350331296.

Adding to 422440621 its reverse (126044224), we get a palindrome (548484845).

The spelling of 422440621 in words is "four hundred twenty-two million, four hundred forty thousand, six hundred twenty-one".