1143155 has 16 divisors (see below), whose sum is σ = 1515360. Its totient is φ = 822528.

The previous prime is 1143143. The next prime is 1143161. The reversal of 1143155 is 5513411.

It is a cyclic number.

It is not a de Polignac number, because 1143155 - 2⁶ = 1143091 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2591 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (94710).

2^1143155 is an apocalyptic number.

1143155 is a deficient number, since it is larger than the sum of its proper divisors (372205).

1143155 is a wasteful number, since it uses less digits than its factorization.

1143155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its digits is 300, while the sum is 20.

The square root of 1143155 is about 1069.1842684963. The cubic root of 1143155 is about 104.5606738455.

Adding to 1143155 its reverse (5513411), we get a palindrome (6656566).

The spelling of 1143155 in words is "one million, one hundred forty-three thousand, one hundred fifty-five".