1147391 has 8 divisors (see below), whose sum is σ = 1380480. Its totient is φ = 931608.

The previous prime is 1147387. The next prime is 1147409. The reversal of 1147391 is 1937411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1147391 - 2² = 1147387 is a prime.

It is a super-2 number, since 2×1147391² = 2633012213762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1147391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4181 + ... + 4446.

It is an arithmetic number, because the mean of its divisors is an integer number (172560).

2^1147391 is an apocalyptic number.

1147391 is a deficient number, since it is larger than the sum of its proper divisors (233089).

1147391 is an equidigital number, since it uses as much as digits as its factorization.

1147391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653.

The product of its digits is 756, while the sum is 26.

The square root of 1147391 is about 1071.1633862301. The cubic root of 1147391 is about 104.6896657011.

The spelling of 1147391 in words is "one million, one hundred forty-seven thousand, three hundred ninety-one".