642292 has 36 divisors (see below), whose sum is σ = 1364580. Its totient is φ = 263424.

The previous prime is 642281. The next prime is 642359. The reversal of 642292 is 292246.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 509796 = 364^2 + 714^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5628 + ... + 5740.

It is an arithmetic number, because the mean of its divisors is an integer number (37905).

2⁶⁴²²⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682290).

642292 is an abundant number, since it is smaller than the sum of its proper divisors (722288).

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

642292 is a wasteful number, since it uses less digits than its factorization.

642292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 151 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 642292 is about 801.4312197563. The cubic root of 642292 is about 86.2801392953.

The spelling of 642292 in words is "six hundred forty-two thousand, two hundred ninety-two".