123500665 has 16 divisors (see below), whose sum is σ = 165179520. Its totient is φ = 88093440.

The previous prime is 123500659. The next prime is 123500677. The reversal of 123500665 is 566005321.

It is not a de Polignac number, because 123500665 - 2⁵ = 123500633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36621 + ... + 39850.

It is an arithmetic number, because the mean of its divisors is an integer number (10323720).

Almost surely, 2^123500665 is an apocalyptic number.

It is an amenable number.

123500665 is a deficient number, since it is larger than the sum of its proper divisors (41678855).

123500665 is a wasteful number, since it uses less digits than its factorization.

123500665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76512.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 123500665 is about 11113.0853051707. The cubic root of 123500665 is about 497.9928400663.

Adding to 123500665 its reverse (566005321), we get a palindrome (689505986).

The spelling of 123500665 in words is "one hundred twenty-three million, five hundred thousand, six hundred sixty-five".