521754042 has 16 divisors (see below), whose sum is σ = 1053261792. Its totient is φ = 172292400.

The previous prime is 521754031. The next prime is 521754071. The reversal of 521754042 is 240457125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405709 + ... + 406992.

It is an arithmetic number, because the mean of its divisors is an integer number (65828862).

Almost surely, 2^521754042 is an apocalyptic number.

521754042 is an abundant number, since it is smaller than the sum of its proper divisors (531507750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521754042 is a wasteful number, since it uses less digits than its factorization.

521754042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812813.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 521754042 is about 22841.9360387862. The cubic root of 521754042 is about 805.0483064514.

The spelling of 521754042 in words is "five hundred twenty-one million, seven hundred fifty-four thousand, forty-two".