123165442 has 24 divisors (see below), whose sum is σ = 197112420. Its totient is φ = 57707520.

The previous prime is 123165439. The next prime is 123165461. The reversal of 123165442 is 244561321.

It can be written as a sum of positive squares in 6 ways, for example, as 108180801 + 14984641 = 10401^2 + 3871^2 .

It is a super-2 number, since 2×123165442² = 30339452206110728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123165442.

It is a congruent number.

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, 236142 + ... + 236662.

Almost surely, 2^123165442 is an apocalyptic number.

123165442 is a deficient number, since it is larger than the sum of its proper divisors (73946978).

123165442 is a wasteful number, since it uses less digits than its factorization.

123165442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 949 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 123165442 is about 11097.9927013852. The cubic root of 123165442 is about 497.5418575423.

The spelling of 123165442 in words is "one hundred twenty-three million, one hundred sixty-five thousand, four hundred forty-two".