1131741978 has 16 divisors (see below), whose sum is σ = 2288917440. Its totient is φ = 373008416.

The previous prime is 1131741943. The next prime is 1131741991. The reversal of 1131741978 is 8791471311.

It is an unprimeable number.

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, 1059150 + ... + 1060217.

It is an arithmetic number, because the mean of its divisors is an integer number (143057340).

Almost surely, 2^1131741978 is an apocalyptic number.

1131741978 is an abundant number, since it is smaller than the sum of its proper divisors (1157175462).

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

1131741978 is a wasteful number, since it uses less digits than its factorization.

1131741978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119461.

The product of its digits is 42336, while the sum is 42.

The square root of 1131741978 is about 33641.3730100304. The cubic root of 1131741978 is about 1042.1153867626.

The spelling of 1131741978 in words is "one billion, one hundred thirty-one million, seven hundred forty-one thousand, nine hundred seventy-eight".