1147491 has 12 divisors (see below), whose sum is σ = 1686360. Its totient is φ = 751680.

The previous prime is 1147463. The next prime is 1147499. The reversal of 1147491 is 1947411.

It is not a de Polignac number, because 1147491 - 2⁵ = 1147459 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1147499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (140530).

2^1147491 is an apocalyptic number.

1147491 is a deficient number, since it is larger than the sum of its proper divisors (538869).

1147491 is a wasteful number, since it uses less digits than its factorization.

1147491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226 (or 2223 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 1147491 is about 1071.2100634329. The cubic root of 1147491 is about 104.6927069958.

The spelling of 1147491 in words is "one million, one hundred forty-seven thousand, four hundred ninety-one".