1296865 has 8 divisors (see below), whose sum is σ = 1565928. Its totient is φ = 1031040.

The previous prime is 1296839. The next prime is 1296877. The reversal of 1296865 is 5686921.

It can be written as a sum of positive squares in 4 ways, for example, as 33489 + 1263376 = 183^2 + 1124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1296865 - 2⁵ = 1296833 is a prime.

It is a Duffinian number.

1296865 is a lucky number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 189 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (195741).

2^1296865 is an apocalyptic number.

It is an amenable number.

1296865 is a deficient number, since it is larger than the sum of its proper divisors (269063).

1296865 is a wasteful number, since it uses less digits than its factorization.

1296865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its digits is 25920, while the sum is 37.

The square root of 1296865 is about 1138.7998068142. The cubic root of 1296865 is about 109.0514864920.

The spelling of 1296865 in words is "one million, two hundred ninety-six thousand, eight hundred sixty-five".