1131978 has 16 divisors (see below), whose sum is σ = 2325600. Its totient is φ = 367056.

The previous prime is 1131973. The next prime is 1131997. The reversal of 1131978 is 8791311.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2328 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (145350).

2^1131978 is an apocalyptic number.

1131978 is an abundant number, since it is smaller than the sum of its proper divisors (1193622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131978 is a wasteful number, since it uses less digits than its factorization.

1131978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141.

The product of its digits is 1512, while the sum is 30.

The square root of 1131978 is about 1063.9445474272. The cubic root of 1131978 is about 104.2187825259.

The spelling of 1131978 in words is "one million, one hundred thirty-one thousand, nine hundred seventy-eight".