642346212 has 24 divisors (see below), whose sum is σ = 1533665056. Its totient is φ = 209135808.

The previous prime is 642346183. The next prime is 642346249. The reversal of 642346212 is 212643246.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 642346212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621913 + ... + 622944.

Almost surely, 2^642346212 is an apocalyptic number.

It is an amenable number.

642346212 is an abundant number, since it is smaller than the sum of its proper divisors (891318844).

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

642346212 is a wasteful number, since it uses less digits than its factorization.

642346212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244907 (or 1244905 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 642346212 is about 25344.5499466848. The cubic root of 642346212 is about 862.8256668937.

Adding to 642346212 its reverse (212643246), we get a palindrome (854989458).

The spelling of 642346212 in words is "six hundred forty-two million, three hundred forty-six thousand, two hundred twelve".