1231280124 has 24 divisors (see below), whose sum is σ = 2880162768. Its totient is φ = 409401600.

The previous prime is 1231280111. The next prime is 1231280147. The reversal of 1231280124 is 4210821321.

It is a junction number, because it is equal to n+sod(n) for n = 1231280094 and 1231280103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123127 + ... + 132750.

It is an arithmetic number, because the mean of its divisors is an integer number (120006782).

Almost surely, 2^1231280124 is an apocalyptic number.

It is an amenable number.

1231280124 is an abundant number, since it is smaller than the sum of its proper divisors (1648882644).

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

1231280124 is a wasteful number, since it uses less digits than its factorization.

1231280124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256285 (or 256283 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1231280124 is about 35089.6013656468. The cubic root of 1231280124 is about 1071.8128420851.

The spelling of 1231280124 in words is "one billion, two hundred thirty-one million, two hundred eighty thousand, one hundred twenty-four".