642161422 has 8 divisors (see below), whose sum is σ = 1100848176. Its totient is φ = 275212032.

The previous prime is 642161419. The next prime is 642161447. The reversal of 642161422 is 224161246.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22934323 + ... + 22934350.

It is an arithmetic number, because the mean of its divisors is an integer number (137606022).

Almost surely, 2^642161422 is an apocalyptic number.

642161422 is a deficient number, since it is larger than the sum of its proper divisors (458686754).

642161422 is a wasteful number, since it uses less digits than its factorization.

642161422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45868682.

The product of its digits is 4608, while the sum is 28.

The square root of 642161422 is about 25340.9041275168. The cubic root of 642161422 is about 862.7429197999.

The spelling of 642161422 in words is "six hundred forty-two million, one hundred sixty-one thousand, four hundred twenty-two".