521212 has 6 divisors (see below), whose sum is σ = 912128. Its totient is φ = 260604.

The previous prime is 521201. The next prime is 521231. The reversal of 521212 is 212125.

It is an alternating number because its digits alternate between odd and even.

521212 is a modest number, since divided by 1212 gives 52 as remainder.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 521192 and 521201.

It is a congruent number.

It is an unprimeable number.

521212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65148 + ... + 65155.

2⁵²¹²¹² is an apocalyptic number.

It is an amenable number.

521212 is a deficient number, since it is larger than the sum of its proper divisors (390916).

521212 is a wasteful number, since it uses less digits than its factorization.

521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130307 (or 130305 counting only the distinct ones).

The product of its digits is 40, while the sum is 13.

The square root of 521212 is about 721.9501367823. The cubic root of 521212 is about 80.4769425881.

Adding to 521212 its reverse (212125), we get a palindrome (733337).

The spelling of 521212 in words is "five hundred twenty-one thousand, two hundred twelve".