123565772 has 12 divisors (see below), whose sum is σ = 235898376. Its totient is φ = 56166240.

The previous prime is 123565763. The next prime is 123565777. The reversal of 123565772 is 277565321.

It is not an unprimeable number, because it can be changed into a prime (123565777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404113 + ... + 1404200.

It is an arithmetic number, because the mean of its divisors is an integer number (19658198).

Almost surely, 2^123565772 is an apocalyptic number.

It is an amenable number.

123565772 is a deficient number, since it is larger than the sum of its proper divisors (112332604).

123565772 is a wasteful number, since it uses less digits than its factorization.

123565772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808328 (or 2808326 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 123565772 is about 11116.0142137369. The cubic root of 123565772 is about 498.0803352064.

The spelling of 123565772 in words is "one hundred twenty-three million, five hundred sixty-five thousand, seven hundred seventy-two".