1296081 has 10 divisors (see below), whose sum is σ = 1936242. Its totient is φ = 864000.

The previous prime is 1296077. The next prime is 1296089. The reversal of 1296081 is 1806921.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 50625 = 1116^2 + 225^2 .

It is not a de Polignac number, because 1296081 - 2² = 1296077 is a prime.

It is a super-2 number, since 2×1296081² = 3359651917122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1296089) 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 9 ways as a sum of consecutive naturals, for example, 7920 + ... + 8081.

2^1296081 is an apocalyptic number.

It is an amenable number.

1296081 is a deficient number, since it is larger than the sum of its proper divisors (640161).

1296081 is an equidigital number, since it uses as much as digits as its factorization.

1296081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16013 (or 16004 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1296081 is about 1138.4555327284. The cubic root of 1296081 is about 109.0295069234.

It can be divided in two parts, 12960 and 81, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 1296081 in words is "one million, two hundred ninety-six thousand, eighty-one".