1231461247 has 2 divisors, whose sum is σ = 1231461248. Its totient is φ = 1231461246.

The previous prime is 1231461223. The next prime is 1231461263. The reversal of 1231461247 is 7421641321.

It is a strong prime.

It is an emirp because it is prime and its reverse (7421641321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231461247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231461277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615730623 + 615730624.

It is an arithmetic number, because the mean of its divisors is an integer number (615730624).

Almost surely, 2^1231461247 is an apocalyptic number.

1231461247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231461247 is an equidigital number, since it uses as much as digits as its factorization.

1231461247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 1231461247 is about 35092.1821350568. The cubic root of 1231461247 is about 1071.8653945562.

The spelling of 1231461247 in words is "one billion, two hundred thirty-one million, four hundred sixty-one thousand, two hundred forty-seven".