123665442 has 16 divisors (see below), whose sum is σ = 247810080. Its totient is φ = 41141952.

The previous prime is 123665419. The next prime is 123665447. The reversal of 123665442 is 244566321.

It is not an unprimeable number, because it can be changed into a prime (123665447) 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, 16567 + ... + 22842.

It is an arithmetic number, because the mean of its divisors is an integer number (15488130).

Almost surely, 2^123665442 is an apocalyptic number.

123665442 is an abundant number, since it is smaller than the sum of its proper divisors (124144638).

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

123665442 is a wasteful number, since it uses less digits than its factorization.

123665442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39937.

The product of its digits is 34560, while the sum is 33.

The square root of 123665442 is about 11120.4964817224. The cubic root of 123665442 is about 498.2142188982.

The spelling of 123665442 in words is "one hundred twenty-three million, six hundred sixty-five thousand, four hundred forty-two".