123145765 has 32 divisors (see below), whose sum is σ = 157044096. Its totient is φ = 92601600.

The previous prime is 123145747. The next prime is 123145769. The reversal of 123145765 is 567541321.

It is not a de Polignac number, because 123145765 - 2¹¹ = 123143717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123145765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123145769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1150842 + ... + 1150948.

It is an arithmetic number, because the mean of its divisors is an integer number (4907628).

Almost surely, 2^123145765 is an apocalyptic number.

It is an amenable number.

123145765 is a deficient number, since it is larger than the sum of its proper divisors (33898331).

123145765 is a wasteful number, since it uses less digits than its factorization.

123145765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 25200, while the sum is 34.

The square root of 123145765 is about 11097.1061543089. The cubic root of 123145765 is about 497.5153602490.

The spelling of 123145765 in words is "one hundred twenty-three million, one hundred forty-five thousand, seven hundred sixty-five".