1281277 has 4 divisors (see below), whose sum is σ = 1289596. Its totient is φ = 1272960.

The previous prime is 1281263. The next prime is 1281281. The reversal of 1281277 is 7721821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 423801 + 857476 = 651^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281277 - 2⁷ = 1281149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281257) 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 in 3 ways as a sum of consecutive naturals, for example, 3924 + ... + 4237.

It is an arithmetic number, because the mean of its divisors is an integer number (322399).

2^1281277 is an apocalyptic number.

It is an amenable number.

1281277 is a deficient number, since it is larger than the sum of its proper divisors (8319).

1281277 is an equidigital number, since it uses as much as digits as its factorization.

1281277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8318.

The product of its digits is 1568, while the sum is 28.

The square root of 1281277 is about 1131.9350688092. The cubic root of 1281277 is about 108.6128000722.

The spelling of 1281277 in words is "one million, two hundred eighty-one thousand, two hundred seventy-seven".