642265133 has 8 divisors (see below), whose sum is σ = 674206848. Its totient is φ = 610658224.

The previous prime is 642265111. The next prime is 642265147. The reversal of 642265133 is 331562246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642265133 - 2⁶ = 642265069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642265133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642265163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 79766 + ... + 87447.

It is an arithmetic number, because the mean of its divisors is an integer number (84275856).

Almost surely, 2^642265133 is an apocalyptic number.

It is an amenable number.

642265133 is a deficient number, since it is larger than the sum of its proper divisors (31941715).

642265133 is a wasteful number, since it uses less digits than its factorization.

642265133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167403.

The product of its digits is 25920, while the sum is 32.

The square root of 642265133 is about 25342.9503609978. The cubic root of 642265133 is about 862.7893624914.

The spelling of 642265133 in words is "six hundred forty-two million, two hundred sixty-five thousand, one hundred thirty-three".