1296729 has 20 divisors (see below), whose sum is σ = 2214784. Its totient is φ = 740664.

The previous prime is 1296727. The next prime is 1296749. The reversal of 1296729 is 9276921.

It is not a de Polignac number, because 1296729 - 2¹ = 1296727 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1296693 and 1296702.

It is not an unprimeable number, because it can be changed into a prime (1296721) 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 19 ways as a sum of consecutive naturals, for example, 577 + ... + 1710.

2^1296729 is an apocalyptic number.

It is an amenable number.

1296729 is a deficient number, since it is larger than the sum of its proper divisors (918055).

1296729 is an equidigital number, since it uses as much as digits as its factorization.

1296729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2297 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 1296729 is about 1138.7400932610. The cubic root of 1296729 is about 109.0476743448.

It can be divided in two parts, 12967 and 29, that added together give a square (12996 = 114²).

The spelling of 1296729 in words is "one million, two hundred ninety-six thousand, seven hundred twenty-nine".