42122 has 4 divisors (see below), whose sum is σ = 63186. Its totient is φ = 21060.

The previous prime is 42101. The next prime is 42131. The reversal of 42122 is 22124.

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., 22801 + 19321 = 151^2 + 139^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

42122 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, 10529 + ... + 10532.

2⁴²¹²² is an apocalyptic number.

42122 is a deficient number, since it is larger than the sum of its proper divisors (21064).

42122 is a wasteful number, since it uses less digits than its factorization.

42122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21063.

The product of its digits is 32, while the sum is 11.

The square root of 42122 is about 205.2364490046. The cubic root of 42122 is about 34.7938906790.

Adding to 42122 its reverse (22124), we get a palindrome (64246).

The spelling of 42122 in words is "forty-two thousand, one hundred twenty-two", and thus it is an iban number.