1296555 has 32 divisors (see below), whose sum is σ = 2291520. Its totient is φ = 622080.

The previous prime is 1296551. The next prime is 1296557. The reversal of 1296555 is 5556921.

It is not a de Polignac number, because 1296555 - 2² = 1296551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1296551) 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 31 ways as a sum of consecutive naturals, for example, 11841 + ... + 11949.

It is an arithmetic number, because the mean of its divisors is an integer number (71610).

2^1296555 is an apocalyptic number.

1296555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1296555 is a deficient number, since it is larger than the sum of its proper divisors (994965).

1296555 is a wasteful number, since it uses less digits than its factorization.

1296555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191.

The product of its digits is 13500, while the sum is 33.

The square root of 1296555 is about 1138.6636904723. The cubic root of 1296555 is about 109.0427966502.

The spelling of 1296555 in words is "one million, two hundred ninety-six thousand, five hundred fifty-five".