1147971 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 678720.

The previous prime is 1147969. The next prime is 1147981. The reversal of 1147971 is 1797411.

It is not a de Polignac number, because 1147971 - 2¹ = 1147969 is a prime.

1147971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1147921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015 + ... + 1823.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1147971 is an apocalyptic number.

1147971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1147971 is a deficient number, since it is larger than the sum of its proper divisors (562749).

1147971 is a wasteful number, since it uses less digits than its factorization.

1147971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its digits is 1764, while the sum is 30.

The square root of 1147971 is about 1071.4340857001. The cubic root of 1147971 is about 104.7073027512.

The spelling of 1147971 in words is "one million, one hundred forty-seven thousand, nine hundred seventy-one".