1206021 has 8 divisors (see below), whose sum is σ = 1645600. Its totient is φ = 785232.

The previous prime is 1206017. The next prime is 1206043.

1206021 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1206021 - 2² = 1206017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1205988 and 1206006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4546 + ... + 4803.

It is an arithmetic number, because the mean of its divisors is an integer number (205700).

2^1206021 is an apocalyptic number.

It is an amenable number.

1206021 is a deficient number, since it is larger than the sum of its proper divisors (439579).

1206021 is an equidigital number, since it uses as much as digits as its factorization.

1206021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1206021 is about 1098.1898742931. The cubic root of 1206021 is about 106.4432901370.

The spelling of 1206021 in words is "one million, two hundred six thousand, twenty-one".