1231434671 has 2 divisors, whose sum is σ = 1231434672. Its totient is φ = 1231434670.

The previous prime is 1231434653. The next prime is 1231434689. The reversal of 1231434671 is 1764341321.

It is a balanced prime because it is at equal distance from previous prime (1231434653) and next prime (1231434689).

It is a cyclic number.

It is not a de Polignac number, because 1231434671 - 2²² = 1227240367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231434601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615717335 + 615717336.

It is an arithmetic number, because the mean of its divisors is an integer number (615717336).

Almost surely, 2^1231434671 is an apocalyptic number.

1231434671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231434671 is an equidigital number, since it uses as much as digits as its factorization.

1231434671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 1231434671 is about 35091.8034731759. The cubic root of 1231434671 is about 1071.8576839063.

Adding to 1231434671 its reverse (1764341321), we get a palindrome (2995775992).

The spelling of 1231434671 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, six hundred seventy-one".