1231470281 has 2 divisors, whose sum is σ = 1231470282. Its totient is φ = 1231470280.

The previous prime is 1231470217. The next prime is 1231470287. The reversal of 1231470281 is 1820741321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223880256 + 7590025 = 34984^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231470281 - 2⁶ = 1231470217 is a prime.

It is a super-2 number, since 2×1231470281² = 3033038105972437922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231470287) 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, 615735140 + 615735141.

It is an arithmetic number, because the mean of its divisors is an integer number (615735141).

Almost surely, 2^1231470281 is an apocalyptic number.

It is an amenable number.

1231470281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231470281 is an equidigital number, since it uses as much as digits as its factorization.

1231470281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1231470281 is about 35092.3108529490. The cubic root of 1231470281 is about 1071.8680156180.

The spelling of 1231470281 in words is "one billion, two hundred thirty-one million, four hundred seventy thousand, two hundred eighty-one".