642260 has 24 divisors (see below), whose sum is σ = 1428840. Its totient is φ = 241664.

The previous prime is 642253. The next prime is 642281. The reversal of 642260 is 62246.

642260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126736 + 515524 = 356^2 + 718^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642260.

It is an unprimeable number.

642260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (59535).

2⁶⁴²²⁶⁰ is an apocalyptic number.

It is an amenable number.

642260 is an abundant number, since it is smaller than the sum of its proper divisors (786580).

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

642260 is a wasteful number, since it uses less digits than its factorization.

642260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 642260 is about 801.4112552242. The cubic root of 642260 is about 86.2787064007.

The spelling of 642260 in words is "six hundred forty-two thousand, two hundred sixty".