642052273 has 4 divisors (see below), whose sum is σ = 645991408. Its totient is φ = 638113140.

The previous prime is 642052261. The next prime is 642052283. The reversal of 642052273 is 372250246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642052273 - 2²⁹ = 105181361 is a prime.

It is a super-2 number, since 2×642052273² = 824462242528933058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642052283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969323 + ... + 1969648.

It is an arithmetic number, because the mean of its divisors is an integer number (161497852).

Almost surely, 2^642052273 is an apocalyptic number.

It is an amenable number.

642052273 is a deficient number, since it is larger than the sum of its proper divisors (3939135).

642052273 is a wasteful number, since it uses less digits than its factorization.

642052273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939134.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 642052273 is about 25338.7504230181. The cubic root of 642052273 is about 862.6940365236.

The spelling of 642052273 in words is "six hundred forty-two million, fifty-two thousand, two hundred seventy-three".