122642 has 16 divisors (see below), whose sum is σ = 204120. Its totient is φ = 54912.

The previous prime is 122611. The next prime is 122651. The reversal of 122642 is 246221.

It can be written as a sum of positive squares in 4 ways, for example, as 78961 + 43681 = 281^2 + 209^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 122642.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 122642.

It is an unprimeable number.

122642 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 in 7 ways as a sum of consecutive naturals, for example, 1334 + ... + 1422.

2¹²²⁶⁴² is an apocalyptic number.

122642 is a deficient number, since it is larger than the sum of its proper divisors (81478).

122642 is a wasteful number, since it uses less digits than its factorization.

122642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its digits is 192, while the sum is 17.

The square root of 122642 is about 350.2027983897. The cubic root of 122642 is about 49.6836020702.

Adding to 122642 its reverse (246221), we get a palindrome (368863).

The spelling of 122642 in words is "one hundred twenty-two thousand, six hundred forty-two".