1147885 has 16 divisors (see below), whose sum is σ = 1488960. Its totient is φ = 846720.

The previous prime is 1147843. The next prime is 1147889. The reversal of 1147885 is 5887411.

It is not a de Polignac number, because 1147885 - 2¹⁵ = 1115117 is a prime.

1147885 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1147885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3945 + ... + 4225.

It is an arithmetic number, because the mean of its divisors is an integer number (93060).

2^1147885 is an apocalyptic number.

It is an amenable number.

1147885 is a deficient number, since it is larger than the sum of its proper divisors (341075).

1147885 is a wasteful number, since it uses less digits than its factorization.

1147885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its digits is 8960, while the sum is 34.

The square root of 1147885 is about 1071.3939518216. The cubic root of 1147885 is about 104.7046879776.

The spelling of 1147885 in words is "one million, one hundred forty-seven thousand, eight hundred eighty-five".