1151978 has 16 divisors (see below), whose sum is σ = 1831680. Its totient is φ = 542256.

The previous prime is 1151963. The next prime is 1151981. The reversal of 1151978 is 8791511.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3476 + ... + 3792.

It is an arithmetic number, because the mean of its divisors is an integer number (114480).

2^1151978 is an apocalyptic number.

1151978 is a deficient number, since it is larger than the sum of its proper divisors (679702).

1151978 is a wasteful number, since it uses less digits than its factorization.

1151978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its digits is 2520, while the sum is 32.

The square root of 1151978 is about 1073.3023805061. The cubic root of 1151978 is about 104.8289884457.

The spelling of 1151978 in words is "one million, one hundred fifty-one thousand, nine hundred seventy-eight".