1139978 has 16 divisors (see below), whose sum is σ = 1975104. Its totient is φ = 483360.

The previous prime is 1139959. The next prime is 1139989. The reversal of 1139978 is 8799311.

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, 1118 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (123444).

2^1139978 is an apocalyptic number.

1139978 is a deficient number, since it is larger than the sum of its proper divisors (835126).

1139978 is a wasteful number, since it uses less digits than its factorization.

1139978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877.

The product of its digits is 13608, while the sum is 38.

The square root of 1139978 is about 1067.6975227095. The cubic root of 1139978 is about 104.4637206847.

The spelling of 1139978 in words is "one million, one hundred thirty-nine thousand, nine hundred seventy-eight".