523942 has 4 divisors (see below), whose sum is σ = 785916. Its totient is φ = 261970.

The previous prime is 523937. The next prime is 523949. The reversal of 523942 is 249325.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523949) by changing a digit.

523942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130984 + ... + 130987.

It is an arithmetic number, because the mean of its divisors is an integer number (196479).

2⁵²³⁹⁴² is an apocalyptic number.

523942 is a deficient number, since it is larger than the sum of its proper divisors (261974).

523942 is a wasteful number, since it uses less digits than its factorization.

523942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261973.

The product of its digits is 2160, while the sum is 25.

The square root of 523942 is about 723.8383797506. The cubic root of 523942 is about 80.6172051435.

The spelling of 523942 in words is "five hundred twenty-three thousand, nine hundred forty-two".