521142 has 8 divisors (see below), whose sum is σ = 1042296. Its totient is φ = 173712.

The previous prime is 521137. The next prime is 521153. The reversal of 521142 is 241125.

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

521142 is an admirable number.

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, 43423 + ... + 43434.

It is an arithmetic number, because the mean of its divisors is an integer number (130287).

2⁵²¹¹⁴² is an apocalyptic number.

521142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

521142 is a wasteful number, since it uses less digits than its factorization.

521142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86862.

The product of its digits is 80, while the sum is 15.

The square root of 521142 is about 721.9016553520. The cubic root of 521142 is about 80.4733396791.

Adding to 521142 its reverse (241125), we get a palindrome (762267).

It can be divided in two parts, 5211 and 42, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 521142 in words is "five hundred twenty-one thousand, one hundred forty-two".