1296129 has 4 divisors (see below), whose sum is σ = 1728176. Its totient is φ = 864084.

The previous prime is 1296109. The next prime is 1296137. The reversal of 1296129 is 9216921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1296129 - 2⁸ = 1295873 is a prime.

It is a D-number.

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

It is a Duffinian number.

It is a Curzon number.

1296129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1296096 and 1296105.

It is not an unprimeable number, because it can be changed into a prime (1296109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216019 + ... + 216024.

It is an arithmetic number, because the mean of its divisors is an integer number (432044).

2^1296129 is an apocalyptic number.

It is an amenable number.

1296129 is a deficient number, since it is larger than the sum of its proper divisors (432047).

1296129 is an equidigital number, since it uses as much as digits as its factorization.

1296129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432046.

The product of its digits is 1944, while the sum is 30.

The square root of 1296129 is about 1138.4766137256. The cubic root of 1296129 is about 109.0308528659.

It can be divided in two parts, 12 and 96129, that added together give a triangular number (96141 = T₄₃₈).

The spelling of 1296129 in words is "one million, two hundred ninety-six thousand, one hundred twenty-nine".