521346 has 16 divisors (see below), whose sum is σ = 1191744. Its totient is φ = 148944.

The previous prime is 521329. The next prime is 521357. The reversal of 521346 is 643125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6165 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (74484).

2⁵²¹³⁴⁶ is an apocalyptic number.

521346 is an abundant number, since it is smaller than the sum of its proper divisors (670398).

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

521346 is a wasteful number, since it uses less digits than its factorization.

521346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12425.

The product of its digits is 720, while the sum is 21.

The square root of 521346 is about 722.0429350115. The cubic root of 521346 is about 80.4838386856.

The spelling of 521346 in words is "five hundred twenty-one thousand, three hundred forty-six".