1206831 has 4 divisors (see below), whose sum is σ = 1609112. Its totient is φ = 804552.

The previous prime is 1206827. The next prime is 1206841. The reversal of 1206831 is 1386021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1206831 - 2² = 1206827 is a prime.

It is a super-2 number, since 2×1206831² = 2912882125122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206798 and 1206807.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 201136 + ... + 201141.

It is an arithmetic number, because the mean of its divisors is an integer number (402278).

2^1206831 is an apocalyptic number.

1206831 is a deficient number, since it is larger than the sum of its proper divisors (402281).

1206831 is an equidigital number, since it uses as much as digits as its factorization.

1206831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402280.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1206831 is about 1098.5586010769. The cubic root of 1206831 is about 106.4671149763.

The spelling of 1206831 in words is "one million, two hundred six thousand, eight hundred thirty-one".