1264450081 has 2 divisors, whose sum is σ = 1264450082. Its totient is φ = 1264450080.

The previous prime is 1264450079. The next prime is 1264450087. The reversal of 1264450081 is 1800544621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843379681 + 421070400 = 29041^2 + 20520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264450081 - 2¹ = 1264450079 is a prime.

It is a super-2 number, since 2×1264450081² = 3197668014681813122, which contains 22 as substring.

Together with 1264450079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1264450087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632225040 + 632225041.

It is an arithmetic number, because the mean of its divisors is an integer number (632225041).

Almost surely, 2^1264450081 is an apocalyptic number.

It is an amenable number.

1264450081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264450081 is an equidigital number, since it uses as much as digits as its factorization.

1264450081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 1264450081 is about 35559.1068644869. The cubic root of 1264450081 is about 1081.3523528310.

The spelling of 1264450081 in words is "one billion, two hundred sixty-four million, four hundred fifty thousand, eighty-one".