1155171 has 4 divisors (see below), whose sum is σ = 1540232. Its totient is φ = 770112.

The previous prime is 1155169. The next prime is 1155179. The reversal of 1155171 is 1715511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1155171 - 2¹ = 1155169 is a prime.

It is a D-number.

It is a Duffinian number.

1155171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1155179) 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, 192526 + ... + 192531.

It is an arithmetic number, because the mean of its divisors is an integer number (385058).

2^1155171 is an apocalyptic number.

1155171 is a deficient number, since it is larger than the sum of its proper divisors (385061).

1155171 is an equidigital number, since it uses as much as digits as its factorization.

1155171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385060.

The product of its digits is 175, while the sum is 21.

The square root of 1155171 is about 1074.7888164658. The cubic root of 1155171 is about 104.9257524992.

It can be divided in two parts, 1155 and 171, that added together give a triangular number (1326 = T₅₁).

The spelling of 1155171 in words is "one million, one hundred fifty-five thousand, one hundred seventy-one".