442012122 has 24 divisors (see below), whose sum is σ = 967569876. Its totient is φ = 145817856.

The previous prime is 442012117. The next prime is 442012139. The reversal of 442012122 is 221210244.

It can be written as a sum of positive squares in 2 ways, for example, as 440622081 + 1390041 = 20991^2 + 1179^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 442012095 and 442012104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124833 + ... + 128324.

Almost surely, 2^442012122 is an apocalyptic number.

442012122 is an abundant number, since it is smaller than the sum of its proper divisors (525557754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442012122 is a wasteful number, since it uses less digits than its factorization.

442012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253262 (or 253259 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 442012122 is about 21024.0843320226. The cubic root of 442012122 is about 761.7481239156.

Adding to 442012122 its reverse (221210244), we get a palindrome (663222366).

The spelling of 442012122 in words is "four hundred forty-two million, twelve thousand, one hundred twenty-two".