1276464769 has 2 divisors, whose sum is σ = 1276464770. Its totient is φ = 1276464768.

The previous prime is 1276464743. The next prime is 1276464779. The reversal of 1276464769 is 9674646721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681836544 + 594628225 = 26112^2 + 24385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276464769 - 2¹¹ = 1276462721 is a prime.

It is a super-2 number, since 2×1276464769² = 3258724612996446722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276464779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638232384 + 638232385.

It is an arithmetic number, because the mean of its divisors is an integer number (638232385).

Almost surely, 2^1276464769 is an apocalyptic number.

It is an amenable number.

1276464769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276464769 is an equidigital number, since it uses as much as digits as its factorization.

1276464769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The square root of 1276464769 is about 35727.6471237612. The cubic root of 1276464769 is about 1084.7665319123.

The spelling of 1276464769 in words is "one billion, two hundred seventy-six million, four hundred sixty-four thousand, seven hundred sixty-nine".