1264163249 has 2 divisors, whose sum is σ = 1264163250. Its totient is φ = 1264163248.

The previous prime is 1264163213. The next prime is 1264163269. The reversal of 1264163249 is 9423614621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1066479649 + 197683600 = 32657^2 + 14060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264163249 - 2¹² = 1264159153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264163269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632081624 + 632081625.

It is an arithmetic number, because the mean of its divisors is an integer number (632081625).

Almost surely, 2^1264163249 is an apocalyptic number.

It is an amenable number.

1264163249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264163249 is an equidigital number, since it uses as much as digits as its factorization.

1264163249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 1264163249 is about 35555.0734635720. The cubic root of 1264163249 is about 1081.2705808104.

The spelling of 1264163249 in words is "one billion, two hundred sixty-four million, one hundred sixty-three thousand, two hundred forty-nine".