521007242 has 8 divisors (see below), whose sum is σ = 893155296. Its totient is φ = 223288812.

The previous prime is 521007239. The next prime is 521007251. The reversal of 521007242 is 242700125.

It is a happy number.

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, 18607388 + ... + 18607415.

It is an arithmetic number, because the mean of its divisors is an integer number (111644412).

Almost surely, 2^521007242 is an apocalyptic number.

521007242 is a deficient number, since it is larger than the sum of its proper divisors (372148054).

521007242 is a wasteful number, since it uses less digits than its factorization.

521007242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37214812.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 521007242 is about 22825.5830593656. The cubic root of 521007242 is about 804.6640275909.

Adding to 521007242 its reverse (242700125), we get a palindrome (763707367).

The spelling of 521007242 in words is "five hundred twenty-one million, seven thousand, two hundred forty-two".