1141209 has 20 divisors (see below), whose sum is σ = 1737076. Its totient is φ = 746496.

The previous prime is 1141171. The next prime is 1141219. The reversal of 1141209 is 9021411.

It can be written as a sum of positive squares in 2 ways, for example, as 455625 + 685584 = 675^2 + 828^2 .

It is not a de Polignac number, because 1141209 - 2⁷ = 1141081 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1141191 and 1141200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1141219) 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 19 ways as a sum of consecutive naturals, for example, 5817 + ... + 6009.

2^1141209 is an apocalyptic number.

It is an amenable number.

1141209 is a deficient number, since it is larger than the sum of its proper divisors (595867).

1141209 is an equidigital number, since it uses as much as digits as its factorization.

1141209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1141209 is about 1068.2738412973. The cubic root of 1141209 is about 104.5013087143.

The spelling of 1141209 in words is "one million, one hundred forty-one thousand, two hundred nine".