123406165 has 16 divisors (see below), whose sum is σ = 155364480. Its totient is φ = 93970240.

The previous prime is 123406147. The next prime is 123406169. The reversal of 123406165 is 561604321.

It is not a de Polignac number, because 123406165 - 2¹³ = 123397973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123406169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4302 + ... + 16288.

It is an arithmetic number, because the mean of its divisors is an integer number (9710280).

Almost surely, 2^123406165 is an apocalyptic number.

It is an amenable number.

123406165 is a deficient number, since it is larger than the sum of its proper divisors (31958315).

123406165 is a wasteful number, since it uses less digits than its factorization.

123406165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12092.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 123406165 is about 11108.8327469631. The cubic root of 123406165 is about 497.8657899227.

The spelling of 123406165 in words is "one hundred twenty-three million, four hundred six thousand, one hundred sixty-five".