523401 has 4 divisors (see below), whose sum is σ = 697872. Its totient is φ = 348932.

The previous prime is 523387. The next prime is 523403. The reversal of 523401 is 104325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523401 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (523403) 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, 87231 + ... + 87236.

It is an arithmetic number, because the mean of its divisors is an integer number (174468).

2⁵²³⁴⁰¹ is an apocalyptic number.

It is an amenable number.

523401 is a deficient number, since it is larger than the sum of its proper divisors (174471).

523401 is a wasteful number, since it uses less digits than its factorization.

523401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174470.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 523401 is about 723.4645810266. The cubic root of 523401 is about 80.5894483003.

Adding to 523401 its reverse (104325), we get a palindrome (627726).

The spelling of 523401 in words is "five hundred twenty-three thousand, four hundred one".