1129978 has 4 divisors (see below), whose sum is σ = 1694970. Its totient is φ = 564988.

The previous prime is 1129963. The next prime is 1129991. The reversal of 1129978 is 8799211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8799211 = 491 ⋅17921.

It can be written as a sum of positive squares in only one way, i.e., 1129969 + 9 = 1063^2 + 3^2 .

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 as a sum of consecutive naturals, namely, 282493 + ... + 282496.

2^1129978 is an apocalyptic number.

1129978 is a deficient number, since it is larger than the sum of its proper divisors (564992).

1129978 is an equidigital number, since it uses as much as digits as its factorization.

1129978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564991.

The product of its digits is 9072, while the sum is 37.

The square root of 1129978 is about 1063.0042332935. The cubic root of 1129978 is about 104.1573677744.

The spelling of 1129978 in words is "one million, one hundred twenty-nine thousand, nine hundred seventy-eight".