1276609 has 4 divisors (see below), whose sum is σ = 1320660. Its totient is φ = 1232560.

The previous prime is 1276603. The next prime is 1276619. The reversal of 1276609 is 9066721.

1276609 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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 595984 + 680625 = 772^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276609 - 2⁷ = 1276481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1276603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21982 + ... + 22039.

It is an arithmetic number, because the mean of its divisors is an integer number (330165).

2^1276609 is an apocalyptic number.

It is an amenable number.

1276609 is a deficient number, since it is larger than the sum of its proper divisors (44051).

1276609 is an equidigital number, since it uses as much as digits as its factorization.

1276609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44050.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1276609 is about 1129.8712316012. The cubic root of 1276609 is about 108.4807387216.

The spelling of 1276609 in words is "one million, two hundred seventy-six thousand, six hundred nine".