521210142 has 12 divisors (see below), whose sum is σ = 1129288680. Its totient is φ = 173736708.

The previous prime is 521210141. The next prime is 521210149. The reversal of 521210142 is 241012125.

521210142 is a `hidden beast` number, since 521 + 2 + 1 + 0 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 28956119 = 521210142 / (5 + 2 + 1 + 2 + 1 + 0 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521210141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14478042 + ... + 14478077.

It is an arithmetic number, because the mean of its divisors is an integer number (94107390).

Almost surely, 2^521210142 is an apocalyptic number.

521210142 is an abundant number, since it is smaller than the sum of its proper divisors (608078538).

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

521210142 is a wasteful number, since it uses less digits than its factorization.

521210142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28956127 (or 28956124 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 521210142 is about 22830.0272010350. The cubic root of 521210142 is about 804.7684696080.

Adding to 521210142 its reverse (241012125), we get a palindrome (762222267).

The spelling of 521210142 in words is "five hundred twenty-one million, two hundred ten thousand, one hundred forty-two".