1246664249 has 2 divisors, whose sum is σ = 1246664250. Its totient is φ = 1246664248.

The previous prime is 1246664203. The next prime is 1246664257. The reversal of 1246664249 is 9424666421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243267600 + 3396649 = 35260^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246664249 - 2⁸ = 1246663993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1246664269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623332124 + 623332125.

It is an arithmetic number, because the mean of its divisors is an integer number (623332125).

Almost surely, 2^1246664249 is an apocalyptic number.

It is an amenable number.

1246664249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246664249 is an equidigital number, since it uses as much as digits as its factorization.

1246664249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 1246664249 is about 35308.1329016418. The cubic root of 1246664249 is about 1076.2582703573.

The spelling of 1246664249 in words is "one billion, two hundred forty-six million, six hundred sixty-four thousand, two hundred forty-nine".