1209021 has 8 divisors (see below), whose sum is σ = 1758624. Its totient is φ = 732720.

The previous prime is 1209017. The next prime is 1209029.

It is a happy number.

1209021 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 1209021 - 2² = 1209017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209029) 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, 18286 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (219828).

2^1209021 is an apocalyptic number.

1209021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1209021 is a deficient number, since it is larger than the sum of its proper divisors (549603).

1209021 is a wasteful number, since it uses less digits than its factorization.

1209021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36651.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1209021 is about 1099.5549099522. The cubic root of 1209021 is about 106.5314769529.

The spelling of 1209021 in words is "one million, two hundred nine thousand, twenty-one".