1157978 has 8 divisors (see below), whose sum is σ = 1747872. Its totient is φ = 575356.

The previous prime is 1157977. The next prime is 1157987. The reversal of 1157978 is 8797511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1157977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (218484).

2^1157978 is an apocalyptic number.

1157978 is a deficient number, since it is larger than the sum of its proper divisors (589894).

1157978 is a wasteful number, since it uses less digits than its factorization.

1157978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

The product of its digits is 17640, while the sum is 38.

The square root of 1157978 is about 1076.0938620771. The cubic root of 1157978 is about 105.0106716289.

The spelling of 1157978 in words is "one million, one hundred fifty-seven thousand, nine hundred seventy-eight".