521064 has 24 divisors (see below), whose sum is σ = 1411410. Its totient is φ = 173664.

The previous prime is 521063. The next prime is 521107. The reversal of 521064 is 460125.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 412164 + 108900 = 642^2 + 330^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (521063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3547 + ... + 3690.

2⁵²¹⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

521064 is an abundant number, since it is smaller than the sum of its proper divisors (890346).

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

521064 is a wasteful number, since it uses less digits than its factorization.

521064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249 (or 7242 counting only the distinct ones).

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

The square root of 521064 is about 721.8476293512. The cubic root of 521064 is about 80.4693246291.

Adding to 521064 its reverse (460125), we get a palindrome (981189).

The spelling of 521064 in words is "five hundred twenty-one thousand, sixty-four".