1156671 has 6 divisors (see below), whose sum is σ = 1670760. Its totient is φ = 771108.

The previous prime is 1156643. The next prime is 1156681. The reversal of 1156671 is 1766511.

It is not a de Polignac number, because 1156671 - 2¹⁸ = 894527 is a prime.

1156671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64251 + ... + 64268.

It is an arithmetic number, because the mean of its divisors is an integer number (278460).

2^1156671 is an apocalyptic number.

1156671 is a deficient number, since it is larger than the sum of its proper divisors (514089).

1156671 is a wasteful number, since it uses less digits than its factorization.

1156671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128525 (or 128522 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1156671 is about 1075.4864015877. The cubic root of 1156671 is about 104.9711485356.

It can be divided in two parts, 115 and 6671, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 1156671 in words is "one million, one hundred fifty-six thousand, six hundred seventy-one".