123434442 has 40 divisors (see below), whose sum is σ = 284073636. Its totient is φ = 40030848.

The previous prime is 123434429. The next prime is 123434449. The reversal of 123434442 is 244434321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91183401 + 32251041 = 9549^2 + 5679^2 .

It is a super-2 number, since 2×123434442² = 30472122943702728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123434449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4303 + ... + 16290.

Almost surely, 2^123434442 is an apocalyptic number.

123434442 is an abundant number, since it is smaller than the sum of its proper divisors (160639194).

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

123434442 is a wasteful number, since it uses less digits than its factorization.

123434442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644 (or 20635 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 123434442 is about 11110.1054000401. The cubic root of 123434442 is about 497.9038136195.

Adding to 123434442 its reverse (244434321), we get a palindrome (367868763).

The spelling of 123434442 in words is "one hundred twenty-three million, four hundred thirty-four thousand, four hundred forty-two".