1231043005 has 16 divisors (see below), whose sum is σ = 1501516800. Its totient is φ = 968781312.

The previous prime is 1231042991. The next prime is 1231043027. The reversal of 1231043005 is 5003401321.

It is a cyclic number.

It is not a de Polignac number, because 1231043005 - 2¹⁷ = 1230911933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73396 + ... + 88594.

It is an arithmetic number, because the mean of its divisors is an integer number (93844800).

Almost surely, 2^1231043005 is an apocalyptic number.

It is an amenable number.

1231043005 is a deficient number, since it is larger than the sum of its proper divisors (270473795).

1231043005 is a wasteful number, since it uses less digits than its factorization.

1231043005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15468.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1231043005 is about 35086.2224384444. Note that the first 3 decimals coincide. The cubic root of 1231043005 is about 1071.7440346977.

Adding to 1231043005 its reverse (5003401321), we get a palindrome (6234444326).

The spelling of 1231043005 in words is "one billion, two hundred thirty-one million, forty-three thousand, five".