523491 has 8 divisors (see below), whose sum is σ = 702144. Its totient is φ = 346920.

The previous prime is 523489. The next prime is 523493. The reversal of 523491 is 194325.

It is an interprime number because it is at equal distance from previous prime (523489) and next prime (523493).

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

It is not a de Polignac number, because 523491 - 2¹ = 523489 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

523491 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (523493) 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, 220 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (87768).

2⁵²³⁴⁹¹ is an apocalyptic number.

523491 is a deficient number, since it is larger than the sum of its proper divisors (178653).

523491 is a wasteful number, since it uses less digits than its factorization.

523491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its digits is 1080, while the sum is 24.

The square root of 523491 is about 723.5267790483. The cubic root of 523491 is about 80.5940672156.

The spelling of 523491 in words is "five hundred twenty-three thousand, four hundred ninety-one".