1231405124 has 12 divisors (see below), whose sum is σ = 2268378000. Its totient is φ = 583297128.

The previous prime is 1231405121. The next prime is 1231405141. The reversal of 1231405124 is 4215041321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231405124.

It is not an unprimeable number, because it can be changed into a prime (1231405121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8101274 + ... + 8101425.

It is an arithmetic number, because the mean of its divisors is an integer number (189031500).

Almost surely, 2^1231405124 is an apocalyptic number.

It is an amenable number.

1231405124 is a deficient number, since it is larger than the sum of its proper divisors (1036972876).

1231405124 is a wasteful number, since it uses less digits than its factorization.

1231405124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16202722 (or 16202720 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1231405124 is about 35091.3824749040. The cubic root of 1231405124 is about 1071.8491111326.

Adding to 1231405124 its reverse (4215041321), we get a palindrome (5446446445).

The spelling of 1231405124 in words is "one billion, two hundred thirty-one million, four hundred five thousand, one hundred twenty-four".