642061422 has 24 divisors (see below), whose sum is σ = 1451618064. Its totient is φ = 204715104.

The previous prime is 642061411. The next prime is 642061439. The reversal of 642061422 is 224160246.

642061422 is a `hidden beast` number, since 6 + 4 + 20 + 614 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 775023 + ... + 775850.

It is an arithmetic number, because the mean of its divisors is an integer number (60484086).

Almost surely, 2^642061422 is an apocalyptic number.

642061422 is an abundant number, since it is smaller than the sum of its proper divisors (809556642).

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

642061422 is a wasteful number, since it uses less digits than its factorization.

642061422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550904 (or 1550901 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 642061422 is about 25338.9309561394. The cubic root of 642061422 is about 862.6981341911.

The spelling of 642061422 in words is "six hundred forty-two million, sixty-one thousand, four hundred twenty-two".