1247417231 has 2 divisors, whose sum is σ = 1247417232. Its totient is φ = 1247417230.

The previous prime is 1247417207. The next prime is 1247417233. The reversal of 1247417231 is 1327147421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1327147421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247417231 - 2¹⁸ = 1247155087 is a prime.

It is a super-2 number, since 2×1247417231² = 3112099496391414722, which contains 22 as substring.

Together with 1247417233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247417233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623708615 + 623708616.

It is an arithmetic number, because the mean of its divisors is an integer number (623708616).

Almost surely, 2^1247417231 is an apocalyptic number.

1247417231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247417231 is an equidigital number, since it uses as much as digits as its factorization.

1247417231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 1247417231 is about 35318.7943027505. The cubic root of 1247417231 is about 1076.4749124885.

The spelling of 1247417231 in words is "one billion, two hundred forty-seven million, four hundred seventeen thousand, two hundred thirty-one".