1121579 has 4 divisors (see below), whose sum is σ = 1135176. Its totient is φ = 1107984.

The previous prime is 1121557. The next prime is 1121599. The reversal of 1121579 is 9751211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9751211 = 71 ⋅137341.

It is a cyclic number.

It is not a de Polignac number, because 1121579 - 2¹² = 1117483 is a prime.

It is a Duffinian number.

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, 6674 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (283794).

2^1121579 is an apocalyptic number.

1121579 is a deficient number, since it is larger than the sum of its proper divisors (13597).

1121579 is an equidigital number, since it uses as much as digits as its factorization.

1121579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596.

The product of its digits is 630, while the sum is 26.

The square root of 1121579 is about 1059.0462690553. The cubic root of 1121579 is about 103.8986623834.

The spelling of 1121579 in words is "one million, one hundred twenty-one thousand, five hundred seventy-nine".