123442 has 16 divisors (see below), whose sum is σ = 209664. Its totient is φ = 54000.

The previous prime is 123439. The next prime is 123449. The reversal of 123442 is 244321.

It is not an unprimeable number, because it can be changed into a prime (123449) 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, 592 + ... + 772.

It is an arithmetic number, because the mean of its divisors is an integer number (13104).

2¹²³⁴⁴² is an apocalyptic number.

123442 is a deficient number, since it is larger than the sum of its proper divisors (86222).

123442 is a wasteful number, since it uses less digits than its factorization.

123442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

The product of its digits is 192, while the sum is 16.

The square root of 123442 is about 351.3431371181. The cubic root of 123442 is about 49.7913975776.

Adding to 123442 its reverse (244321), we get a palindrome (367763).

It can be divided in two parts, 123 and 442, that added together give a palindrome (565).

The spelling of 123442 in words is "one hundred twenty-three thousand, four hundred forty-two", and thus it is an iban number.