1161878 has 4 divisors (see below), whose sum is σ = 1742820. Its totient is φ = 580938.

The previous prime is 1161877. The next prime is 1161883. The reversal of 1161878 is 8781611.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161871) 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 as a sum of consecutive naturals, namely, 290468 + ... + 290471.

It is an arithmetic number, because the mean of its divisors is an integer number (435705).

2^1161878 is an apocalyptic number.

1161878 is a deficient number, since it is larger than the sum of its proper divisors (580942).

1161878 is an equidigital number, since it uses as much as digits as its factorization.

1161878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580941.

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

The square root of 1161878 is about 1077.9044484554. The cubic root of 1161878 is about 105.1284293949.

The spelling of 1161878 in words is "one million, one hundred sixty-one thousand, eight hundred seventy-eight".