1231590043 has 2 divisors, whose sum is σ = 1231590044. Its totient is φ = 1231590042.

The previous prime is 1231590037. The next prime is 1231590053. The reversal of 1231590043 is 3400951321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231590043 - 2⁵ = 1231590011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231589993 and 1231590020.

It is not a weakly prime, because it can be changed into another prime (1231590053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615795021 + 615795022.

It is an arithmetic number, because the mean of its divisors is an integer number (615795022).

Almost surely, 2^1231590043 is an apocalyptic number.

1231590043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231590043 is an equidigital number, since it uses as much as digits as its factorization.

1231590043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1231590043 is about 35094.0171966676. The cubic root of 1231590043 is about 1071.9027613195.

The spelling of 1231590043 in words is "one billion, two hundred thirty-one million, five hundred ninety thousand, forty-three".