1247122469 has 2 divisors, whose sum is σ = 1247122470. Its totient is φ = 1247122468.

The previous prime is 1247122441. The next prime is 1247122531. The reversal of 1247122469 is 9642217421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989102500 + 258019969 = 31450^2 + 16063^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247122469 - 2⁸ = 1247122213 is a prime.

It is a super-2 number, since 2×1247122469² = 3110628905369311922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247122069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623561234 + 623561235.

It is an arithmetic number, because the mean of its divisors is an integer number (623561235).

Almost surely, 2^1247122469 is an apocalyptic number.

It is an amenable number.

1247122469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247122469 is an equidigital number, since it uses as much as digits as its factorization.

1247122469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 1247122469 is about 35314.6211787696. The cubic root of 1247122469 is about 1076.3901162427.

The spelling of 1247122469 in words is "one billion, two hundred forty-seven million, one hundred twenty-two thousand, four hundred sixty-nine".