642248112 has 40 divisors (see below), whose sum is σ = 1809973440. Its totient is φ = 194620480.

The previous prime is 642248081. The next prime is 642248137. The reversal of 642248112 is 211842246.

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 642248112.

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, 607662 + ... + 608717.

It is an arithmetic number, because the mean of its divisors is an integer number (45249336).

Almost surely, 2^642248112 is an apocalyptic number.

It is an amenable number.

642248112 is an abundant number, since it is smaller than the sum of its proper divisors (1167725328).

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

642248112 is a wasteful number, since it uses less digits than its factorization.

642248112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216401 (or 1216395 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 642248112 is about 25342.6145454647. The cubic root of 642248112 is about 862.7817406820.

The spelling of 642248112 in words is "six hundred forty-two million, two hundred forty-eight thousand, one hundred twelve".