521002142 has 8 divisors (see below), whose sum is σ = 781601832. Its totient is φ = 260468200.

The previous prime is 521002121. The next prime is 521002169. The reversal of 521002142 is 241200125.

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

It is a self number, because there is not a number n which added to its sum of digits gives 521002142.

It is a congruent number.

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, 16892 + ... + 36432.

It is an arithmetic number, because the mean of its divisors is an integer number (97700229).

Almost surely, 2^521002142 is an apocalyptic number.

521002142 is a deficient number, since it is larger than the sum of its proper divisors (260599690).

521002142 is a wasteful number, since it uses less digits than its factorization.

521002142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32874.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 521002142 is about 22825.4713423403. The cubic root of 521002142 is about 804.6614020357.

Adding to 521002142 its reverse (241200125), we get a palindrome (762202267).

The spelling of 521002142 in words is "five hundred twenty-one million, two thousand, one hundred forty-two".