521542 has 8 divisors (see below), whose sum is σ = 894096. Its totient is φ = 223512.

The previous prime is 521539. The next prime is 521551. The reversal of 521542 is 245125.

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

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, 18613 + ... + 18640.

It is an arithmetic number, because the mean of its divisors is an integer number (111762).

2⁵²¹⁵⁴² is an apocalyptic number.

521542 is a deficient number, since it is larger than the sum of its proper divisors (372554).

521542 is a wasteful number, since it uses less digits than its factorization.

521542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37262.

The product of its digits is 400, while the sum is 19.

The square root of 521542 is about 722.1786482582. The cubic root of 521542 is about 80.4939233868.

Adding to 521542 its reverse (245125), we get a palindrome (766667).

The spelling of 521542 in words is "five hundred twenty-one thousand, five hundred forty-two".