642052274 has 8 divisors (see below), whose sum is σ = 963904368. Its totient is φ = 320750820.

The previous prime is 642052261. The next prime is 642052283. The reversal of 642052274 is 472250246.

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

It is a super-2 number, since 2×642052274² = 824462245097142152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642052274.

It is an unprimeable number.

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, 134732 + ... + 139415.

It is an arithmetic number, because the mean of its divisors is an integer number (120488046).

Almost surely, 2^642052274 is an apocalyptic number.

642052274 is a deficient number, since it is larger than the sum of its proper divisors (321852094).

642052274 is a wasteful number, since it uses less digits than its factorization.

642052274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275320.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 642052274 is about 25338.7504427507. The cubic root of 642052274 is about 862.6940369715.

The spelling of 642052274 in words is "six hundred forty-two million, fifty-two thousand, two hundred seventy-four".