523642 has 16 divisors (see below), whose sum is σ = 908352. Its totient is φ = 221760.

The previous prime is 523639. The next prime is 523657. The reversal of 523642 is 246325.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (56772).

2⁵²³⁶⁴² is an apocalyptic number.

523642 is a deficient number, since it is larger than the sum of its proper divisors (384710).

523642 is a wasteful number, since it uses less digits than its factorization.

523642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its digits is 1440, while the sum is 22.

The square root of 523642 is about 723.6311214977. The cubic root of 523642 is about 80.6018155399.

Adding to 523642 its reverse (246325), we get a palindrome (769967).

It can be divided in two parts, 5236 and 42, that multiplied together give a palindrome (219912).

The spelling of 523642 in words is "five hundred twenty-three thousand, six hundred forty-two".