521235 has 56 divisors (see below), whose sum is σ = 1101744. Its totient is φ = 233280.

The previous prime is 521231. The next prime is 521243. The reversal of 521235 is 532125.

It is a happy number.

It is not a de Polignac number, because 521235 - 2² = 521231 is a prime.

It is a nialpdrome in base 3 and base 9.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (521231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 40089 + ... + 40101.

It is an arithmetic number, because the mean of its divisors is an integer number (19674).

2⁵²¹²³⁵ is an apocalyptic number.

521235 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

521235 is an abundant number, since it is smaller than the sum of its proper divisors (580509).

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

521235 is a wasteful number, since it uses less digits than its factorization.

521235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47 (or 32 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 521235 is about 721.9660656845. The cubic root of 521235 is about 80.4781263307.

The spelling of 521235 in words is "five hundred twenty-one thousand, two hundred thirty-five".