521453 has 4 divisors (see below), whose sum is σ = 523740. Its totient is φ = 519168.

The previous prime is 521447. The next prime is 521471. The reversal of 521453 is 354125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 515524 + 5929 = 718^2 + 77^2 .

It is a cyclic number.

It is not a de Polignac number, because 521453 - 2¹⁸ = 259309 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 (521483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (130935).

2⁵²¹⁴⁵³ is an apocalyptic number.

It is an amenable number.

521453 is a deficient number, since it is larger than the sum of its proper divisors (2287).

521453 is a wasteful number, since it uses less digits than its factorization.

521453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286.

The product of its digits is 600, while the sum is 20.

The square root of 521453 is about 722.1170265269. The cubic root of 521453 is about 80.4893444225.

Adding to 521453 its reverse (354125), we get a palindrome (875578).

The spelling of 521453 in words is "five hundred twenty-one thousand, four hundred fifty-three".