1121155 has 16 divisors (see below), whose sum is σ = 1557504. Its totient is φ = 758880.

The previous prime is 1121147. The next prime is 1121173. The reversal of 1121155 is 5511211.

It is not a de Polignac number, because 1121155 - 2³ = 1121147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3450 + ... + 3760.

It is an arithmetic number, because the mean of its divisors is an integer number (97344).

2^1121155 is an apocalyptic number.

1121155 is a deficient number, since it is larger than the sum of its proper divisors (436349).

1121155 is a wasteful number, since it uses less digits than its factorization.

1121155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 50, while the sum is 16.

The square root of 1121155 is about 1058.8460700215. The cubic root of 1121155 is about 103.8855681697.

Adding to 1121155 its reverse (5511211), we get a palindrome (6632366).

It can be divided in two parts, 11211 and 55, that multiplied together give a triangular number (616605 = T₁₁₁₀).

The spelling of 1121155 in words is "one million, one hundred twenty-one thousand, one hundred fifty-five".