1276987 has 2 divisors, whose sum is σ = 1276988. Its totient is φ = 1276986.

The previous prime is 1276973. The next prime is 1276999. The reversal of 1276987 is 7896721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1276987 - 2¹¹ = 1274939 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1276927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638493 + 638494.

It is an arithmetic number, because the mean of its divisors is an integer number (638494).

2^1276987 is an apocalyptic number.

1276987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276987 is an equidigital number, since it uses as much as digits as its factorization.

1276987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 1276987 is about 1130.0384949195. The cubic root of 1276987 is about 108.4914446028.

The spelling of 1276987 in words is "one million, two hundred seventy-six thousand, nine hundred eighty-seven".