1209801 has 4 divisors (see below), whose sum is σ = 1613072. Its totient is φ = 806532.

The previous prime is 1209781. The next prime is 1209809. The reversal of 1209801 is 1089021.

1209801 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1209801 - 2¹⁰ = 1208777 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1209801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1209809) 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, 201631 + ... + 201636.

It is an arithmetic number, because the mean of its divisors is an integer number (403268).

2^1209801 is an apocalyptic number.

It is an amenable number.

1209801 is a deficient number, since it is larger than the sum of its proper divisors (403271).

1209801 is an equidigital number, since it uses as much as digits as its factorization.

1209801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403270.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1209801 is about 1099.9095417351. The cubic root of 1209801 is about 106.5543816251.

The spelling of 1209801 in words is "one million, two hundred nine thousand, eight hundred one".