1161887 has 8 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 1115224.

The previous prime is 1161883. The next prime is 1161893. The reversal of 1161887 is 7881611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161887 - 2² = 1161883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564 + ... + 2982.

It is an arithmetic number, because the mean of its divisors is an integer number (151200).

2^1161887 is an apocalyptic number.

1161887 is a deficient number, since it is larger than the sum of its proper divisors (47713).

1161887 is an equidigital number, since it uses as much as digits as its factorization.

1161887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525.

The product of its digits is 2688, while the sum is 32.

The square root of 1161887 is about 1077.9086232144. The cubic root of 1161887 is about 105.1287008386.

It can be divided in two parts, 1161 and 887, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1161887 in words is "one million, one hundred sixty-one thousand, eight hundred eighty-seven".