1156871 has 4 divisors (see below), whose sum is σ = 1159200. Its totient is φ = 1154544.

The previous prime is 1156849. The next prime is 1156873. The reversal of 1156871 is 1786511.

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

It is a cyclic number.

It is not a de Polignac number, because 1156871 - 2⁶ = 1156807 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156873) 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, 86 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (289800).

2^1156871 is an apocalyptic number.

1156871 is a deficient number, since it is larger than the sum of its proper divisors (2329).

1156871 is an equidigital number, since it uses as much as digits as its factorization.

1156871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its digits is 1680, while the sum is 29.

The square root of 1156871 is about 1075.5793787536. The cubic root of 1156871 is about 104.9771983746.

The spelling of 1156871 in words is "one million, one hundred fifty-six thousand, eight hundred seventy-one".