123215752 has 24 divisors (see below), whose sum is σ = 253943550. Its totient is φ = 56006720.

The previous prime is 123215737. The next prime is 123215753. The reversal of 123215752 is 257512321.

It can be written as a sum of positive squares in only one way, i.e., 119552356 + 3663396 = 10934^2 + 1914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123215752.

It is not an unprimeable number, because it can be changed into a prime (123215753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62677 + ... + 64612.

Almost surely, 2^123215752 is an apocalyptic number.

It is an amenable number.

123215752 is an abundant number, since it is smaller than the sum of its proper divisors (130727798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123215752 is a wasteful number, since it uses less digits than its factorization.

123215752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127317 (or 127302 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 123215752 is about 11100.2590960752. The cubic root of 123215752 is about 497.6095927852.

The spelling of 123215752 in words is "one hundred twenty-three million, two hundred fifteen thousand, seven hundred fifty-two".