642522346 has 8 divisors (see below), whose sum is σ = 969355044. Its totient is φ = 319404000.

The previous prime is 642522341. The next prime is 642522379. The reversal of 642522346 is 643225246.

It can be written as a sum of positive squares in 2 ways, for example, as 618069321 + 24453025 = 24861^2 + 4945^2 .

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

It is not an unprimeable number, because it can be changed into a prime (642522341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928155 + ... + 928846.

Almost surely, 2^642522346 is an apocalyptic number.

642522346 is a deficient number, since it is larger than the sum of its proper divisors (326832698).

642522346 is a wasteful number, since it uses less digits than its factorization.

642522346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857176.

The product of its digits is 69120, while the sum is 34.

The square root of 642522346 is about 25348.0244989624. The cubic root of 642522346 is about 862.9045231474.

The spelling of 642522346 in words is "six hundred forty-two million, five hundred twenty-two thousand, three hundred forty-six".