521460 has 36 divisors (see below), whose sum is σ = 1582308. Its totient is φ = 139008.

The previous prime is 521447. The next prime is 521471. The reversal of 521460 is 64125.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 404496 = 342^2 + 636^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

521460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 1269 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (43953).

2⁵²¹⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

521460 is an abundant number, since it is smaller than the sum of its proper divisors (1060848).

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

521460 is a wasteful number, since it uses less digits than its factorization.

521460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 521460 is about 722.1218733704. The cubic root of 521460 is about 80.4897045846.

Adding to 521460 its reverse (64125), we get a palindrome (585585).

The spelling of 521460 in words is "five hundred twenty-one thousand, four hundred sixty".