1121009 has 4 divisors (see below), whose sum is σ = 1123440. Its totient is φ = 1118580.

The previous prime is 1120993. The next prime is 1121011. The reversal of 1121009 is 9001211.

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 a cyclic number.

It is not a de Polignac number, because 1121009 - 2⁴ = 1120993 is a prime.

It is a super-2 number, since 2×1121009² = 2513322356162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120984 and 1121002.

It is not an unprimeable number, because it can be changed into a prime (1121509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (280860).

2^1121009 is an apocalyptic number.

It is an amenable number.

1121009 is a deficient number, since it is larger than the sum of its proper divisors (2431).

1121009 is an equidigital number, since it uses as much as digits as its factorization.

1121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1121009 is about 1058.7771248001. Note that the first 3 decimals coincide. The cubic root of 1121009 is about 103.8810585490.

The spelling of 1121009 in words is "one million, one hundred twenty-one thousand, nine".