521792042 has 8 divisors (see below), whose sum is σ = 783608196. Its totient is φ = 260589312.

The previous prime is 521792009. The next prime is 521792069. The reversal of 521792042 is 240297125.

It can be written as a sum of positive squares in 2 ways, for example, as 490666801 + 31125241 = 22151^2 + 5579^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151223 + ... + 154634.

Almost surely, 2^521792042 is an apocalyptic number.

521792042 is a deficient number, since it is larger than the sum of its proper divisors (261816154).

521792042 is a wasteful number, since it uses less digits than its factorization.

521792042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306712.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 521792042 is about 22842.7678270388. The cubic root of 521792042 is about 805.0678502022.

The spelling of 521792042 in words is "five hundred twenty-one million, seven hundred ninety-two thousand, forty-two".