1147978 has 16 divisors (see below), whose sum is σ = 1884960. Its totient is φ = 521136.

The previous prime is 1147969. The next prime is 1147981. The reversal of 1147978 is 8797411.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1413 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (117810).

2^1147978 is an apocalyptic number.

1147978 is a deficient number, since it is larger than the sum of its proper divisors (736982).

1147978 is a wasteful number, since it uses less digits than its factorization.

1147978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its digits is 14112, while the sum is 37.

The square root of 1147978 is about 1071.4373523450. The cubic root of 1147978 is about 104.7075155759.

The spelling of 1147978 in words is "one million, one hundred forty-seven thousand, nine hundred seventy-eight".