523442 has 4 divisors (see below), whose sum is σ = 785166. Its totient is φ = 261720.

The previous prime is 523433. The next prime is 523459. The reversal of 523442 is 244325.

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

It can be written as a sum of positive squares in only one way, i.e., 491401 + 32041 = 701^2 + 179^2 .

It is an unprimeable number.

523442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130859 + ... + 130862.

2⁵²³⁴⁴² is an apocalyptic number.

523442 is a deficient number, since it is larger than the sum of its proper divisors (261724).

523442 is a wasteful number, since it uses less digits than its factorization.

523442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261723.

The product of its digits is 960, while the sum is 20.

The square root of 523442 is about 723.4929163440. The cubic root of 523442 is about 80.5915525384.

Adding to 523442 its reverse (244325), we get a palindrome (767767).

The spelling of 523442 in words is "five hundred twenty-three thousand, four hundred forty-two".