1276640003 has 2 divisors, whose sum is σ = 1276640004. Its totient is φ = 1276640002.

The previous prime is 1276639997. The next prime is 1276640021. The reversal of 1276640003 is 3000466721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1276640003 - 2⁸ = 1276639747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1276640063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638320001 + 638320002.

It is an arithmetic number, because the mean of its divisors is an integer number (638320002).

Almost surely, 2^1276640003 is an apocalyptic number.

1276640003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276640003 is an equidigital number, since it uses as much as digits as its factorization.

1276640003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1276640003 is about 35730.0993981265. The cubic root of 1276640003 is about 1084.8161688171.

The spelling of 1276640003 in words is "one billion, two hundred seventy-six million, six hundred forty thousand, three".