1206891 has 12 divisors (see below), whose sum is σ = 1992432. Its totient is φ = 689616.

The previous prime is 1206869. The next prime is 1206941. The reversal of 1206891 is 1986021.

It is not a de Polignac number, because 1206891 - 2⁶ = 1206827 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1206841) 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 11 ways as a sum of consecutive naturals, for example, 9516 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (166036).

2^1206891 is an apocalyptic number.

1206891 is a deficient number, since it is larger than the sum of its proper divisors (785541).

1206891 is a wasteful number, since it uses less digits than its factorization.

1206891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19170 (or 19167 counting only the distinct ones).

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

The square root of 1206891 is about 1098.5859092488. The cubic root of 1206891 is about 106.4688793551.

The spelling of 1206891 in words is "one million, two hundred six thousand, eight hundred ninety-one".