1156885 has 8 divisors (see below), whose sum is σ = 1394136. Its totient is φ = 921600.

The previous prime is 1156873. The next prime is 1156907. The reversal of 1156885 is 5886511.

It can be written as a sum of positive squares in 4 ways, for example, as 835396 + 321489 = 914^2 + 567^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1156885 is a prime.

It is a Duffinian number.

1156885 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (174267).

2^1156885 is an apocalyptic number.

It is an amenable number.

1156885 is a deficient number, since it is larger than the sum of its proper divisors (237251).

1156885 is an equidigital number, since it uses as much as digits as its factorization.

1156885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its digits is 9600, while the sum is 34.

The square root of 1156885 is about 1075.5858868542. The cubic root of 1156885 is about 104.9776218372.

The spelling of 1156885 in words is "one million, one hundred fifty-six thousand, eight hundred eighty-five".