1156147 has 4 divisors (see below), whose sum is σ = 1167696. Its totient is φ = 1144600.

The previous prime is 1156121. The next prime is 1156151. The reversal of 1156147 is 7416511.

It is a happy number.

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 1156147 - 2⁷ = 1156019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156157) 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, 5623 + ... + 5824.

It is an arithmetic number, because the mean of its divisors is an integer number (291924).

2^1156147 is an apocalyptic number.

1156147 is a deficient number, since it is larger than the sum of its proper divisors (11549).

1156147 is a wasteful number, since it uses less digits than its factorization.

1156147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11548.

The product of its digits is 840, while the sum is 25.

The square root of 1156147 is about 1075.2427632865. The cubic root of 1156147 is about 104.9552946497.

The spelling of 1156147 in words is "one million, one hundred fifty-six thousand, one hundred forty-seven".