1147839 has 16 divisors (see below), whose sum is σ = 1908480. Its totient is φ = 596160.

The previous prime is 1147819. The next prime is 1147841. The reversal of 1147839 is 9387411.

It is not a de Polignac number, because 1147839 - 2⁷ = 1147711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2254 + ... + 2715.

It is an arithmetic number, because the mean of its divisors is an integer number (119280).

2^1147839 is an apocalyptic number.

1147839 is a deficient number, since it is larger than the sum of its proper divisors (760641).

1147839 is a wasteful number, since it uses less digits than its factorization.

1147839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990.

The product of its digits is 6048, while the sum is 33.

The square root of 1147839 is about 1071.3724842463. The cubic root of 1147839 is about 104.7032893241.

The spelling of 1147839 in words is "one million, one hundred forty-seven thousand, eight hundred thirty-nine".