1211859 has 12 divisors (see below), whose sum is σ = 1909752. Its totient is φ = 734400.

The previous prime is 1211857. The next prime is 1211863. The reversal of 1211859 is 9581121.

It is not a de Polignac number, because 1211859 - 2¹ = 1211857 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1211857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6022 + ... + 6219.

It is an arithmetic number, because the mean of its divisors is an integer number (159146).

2^1211859 is an apocalyptic number.

1211859 is a deficient number, since it is larger than the sum of its proper divisors (697893).

1211859 is a wasteful number, since it uses less digits than its factorization.

1211859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12258 (or 12255 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 1211859 is about 1100.8446756923. The cubic root of 1211859 is about 106.6147675041.

The spelling of 1211859 in words is "one million, two hundred eleven thousand, eight hundred fifty-nine".