422521404 has 24 divisors (see below), whose sum is σ = 987095760. Its totient is φ = 140667264.

The previous prime is 422521403. The next prime is 422521423. The reversal of 422521404 is 404125224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422521403) 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, 11289 + ... + 31184.

It is an arithmetic number, because the mean of its divisors is an integer number (41128990).

Almost surely, 2^422521404 is an apocalyptic number.

It is an amenable number.

422521404 is an abundant number, since it is smaller than the sum of its proper divisors (564574356).

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

422521404 is a wasteful number, since it uses less digits than its factorization.

422521404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43309 (or 43307 counting only the distinct ones).

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

The square root of 422521404 is about 20555.3254413546. The cubic root of 422521404 is about 750.3828587479.

Adding to 422521404 its reverse (404125224), we get a palindrome (826646628).

The spelling of 422521404 in words is "four hundred twenty-two million, five hundred twenty-one thousand, four hundred four".