1156971 has 4 divisors (see below), whose sum is σ = 1542632. Its totient is φ = 771312.

The previous prime is 1156963. The next prime is 1156997. The reversal of 1156971 is 1796511.

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

It is not a de Polignac number, because 1156971 - 2³ = 1156963 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156171) 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, 192826 + ... + 192831.

It is an arithmetic number, because the mean of its divisors is an integer number (385658).

2^1156971 is an apocalyptic number.

1156971 is a deficient number, since it is larger than the sum of its proper divisors (385661).

1156971 is an equidigital number, since it uses as much as digits as its factorization.

1156971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385660.

The product of its digits is 1890, while the sum is 30.

The square root of 1156971 is about 1075.6258643227. The cubic root of 1156971 is about 104.9802230326.

The spelling of 1156971 in words is "one million, one hundred fifty-six thousand, nine hundred seventy-one".