521695 has 8 divisors (see below), whose sum is σ = 632736. Its totient is φ = 412896.

The previous prime is 521693. The next prime is 521707. The reversal of 521695 is 596125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521695 - 2¹ = 521693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9 + ... + 1021.

It is an arithmetic number, because the mean of its divisors is an integer number (79092).

2⁵²¹⁶⁹⁵ is an apocalyptic number.

521695 is a deficient number, since it is larger than the sum of its proper divisors (111041).

521695 is a wasteful number, since it uses less digits than its factorization.

521695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 2700, while the sum is 28.

The square root of 521695 is about 722.2845699584. The cubic root of 521695 is about 80.5017938723.

The spelling of 521695 in words is "five hundred twenty-one thousand, six hundred ninety-five".