1232123280 has 80 divisors (see below), whose sum is σ = 4044276864. Its totient is φ = 309237760.

The previous prime is 1232123239. The next prime is 1232123281. The reversal of 1232123280 is 823212321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1232123280.

It is not an unprimeable number, because it can be changed into a prime (1232123281) 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 15 ways as a sum of consecutive naturals, for example, 146916 + ... + 155075.

Almost surely, 2^1232123280 is an apocalyptic number.

1232123280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232123280 is an abundant number, since it is smaller than the sum of its proper divisors (2812153584).

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

1232123280 is a wasteful number, since it uses less digits than its factorization.

1232123280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302024 (or 302018 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1232123280 is about 35101.6136381221. The cubic root of 1232123280 is about 1072.0574382605.

The spelling of 1232123280 in words is "one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred eighty".