523861 has 8 divisors (see below), whose sum is σ = 574560. Its totient is φ = 474672.

The previous prime is 523847. The next prime is 523867. The reversal of 523861 is 168325.

It is a happy number.

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 523861 - 2⁵ = 523829 is a prime.

It is a Duffinian number.

523861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523867) 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, 426 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁵²³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

523861 is a deficient number, since it is larger than the sum of its proper divisors (50699).

523861 is a wasteful number, since it uses less digits than its factorization.

523861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755.

The product of its digits is 1440, while the sum is 25.

The square root of 523861 is about 723.7824258712. The cubic root of 523861 is about 80.6130505296.

The spelling of 523861 in words is "five hundred twenty-three thousand, eight hundred sixty-one".