1321234247 has 2 divisors, whose sum is σ = 1321234248. Its totient is φ = 1321234246.

The previous prime is 1321234219. The next prime is 1321234261. The reversal of 1321234247 is 7424321231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321234247 - 2²² = 1317039943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321234267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660617123 + 660617124.

It is an arithmetic number, because the mean of its divisors is an integer number (660617124).

Almost surely, 2^1321234247 is an apocalyptic number.

1321234247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321234247 is an equidigital number, since it uses as much as digits as its factorization.

1321234247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 1321234247 is about 36348.7860457540. The cubic root of 1321234247 is about 1097.3031032738.

Adding to 1321234247 its reverse (7424321231), we get a palindrome (8745555478).

The spelling of 1321234247 in words is "one billion, three hundred twenty-one million, two hundred thirty-four thousand, two hundred forty-seven".