642272 has 12 divisors (see below), whose sum is σ = 1264536. Its totient is φ = 321120.

The previous prime is 642253. The next prime is 642281. The reversal of 642272 is 272246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004 + ... + 10067.

It is an arithmetic number, because the mean of its divisors is an integer number (105378).

2⁶⁴²²⁷² is an apocalyptic number.

It is an amenable number.

642272 is a deficient number, since it is larger than the sum of its proper divisors (622264).

642272 is a wasteful number, since it uses less digits than its factorization.

642272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20081 (or 20073 counting only the distinct ones).

The product of its digits is 1344, while the sum is 23.

The square root of 642272 is about 801.4187419820. The cubic root of 642272 is about 86.2792437418.

The spelling of 642272 in words is "six hundred forty-two thousand, two hundred seventy-two".