1264361851 has 2 divisors, whose sum is σ = 1264361852. Its totient is φ = 1264361850.

The previous prime is 1264361849. The next prime is 1264361867. The reversal of 1264361851 is 1581634621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264361851 - 2¹ = 1264361849 is a prime.

It is a super-2 number, since 2×1264361851² = 3197221780528292402, which contains 22 as substring.

Together with 1264361849, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1264361851.

It is not a weakly prime, because it can be changed into another prime (1264361881) 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, 632180925 + 632180926.

It is an arithmetic number, because the mean of its divisors is an integer number (632180926).

Almost surely, 2^1264361851 is an apocalyptic number.

1264361851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264361851 is an equidigital number, since it uses as much as digits as its factorization.

1264361851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 1264361851 is about 35557.8662323824. The cubic root of 1264361851 is about 1081.3272009386.

The spelling of 1264361851 in words is "one billion, two hundred sixty-four million, three hundred sixty-one thousand, eight hundred fifty-one".