642214212 has 48 divisors (see below), whose sum is σ = 1579468800. Its totient is φ = 202534560.

The previous prime is 642214207. The next prime is 642214213. The reversal of 642214212 is 212412246.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (642214213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 235537 + ... + 238247.

It is an arithmetic number, because the mean of its divisors is an integer number (32905600).

Almost surely, 2^642214212 is an apocalyptic number.

It is an amenable number.

642214212 is an abundant number, since it is smaller than the sum of its proper divisors (937254588).

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

642214212 is a wasteful number, since it uses less digits than its factorization.

642214212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776 (or 3774 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 642214212 is about 25341.9457027277. The cubic root of 642214212 is about 862.7665602477.

Adding to 642214212 its reverse (212412246), we get a palindrome (854626458).

The spelling of 642214212 in words is "six hundred forty-two million, two hundred fourteen thousand, two hundred twelve".