1195541978 has 32 divisors (see below), whose sum is σ = 1981808640. Its totient is φ = 538377840.

The previous prime is 1195541933. The next prime is 1195541987. The reversal of 1195541978 is 8791455911.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141863 + ... + 150053.

It is an arithmetic number, because the mean of its divisors is an integer number (61931520).

Almost surely, 2^1195541978 is an apocalyptic number.

1195541978 is a deficient number, since it is larger than the sum of its proper divisors (786266662).

1195541978 is a wasteful number, since it uses less digits than its factorization.

1195541978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402.

The product of its digits is 453600, while the sum is 50.

The square root of 1195541978 is about 34576.6102734204. The cubic root of 1195541978 is about 1061.3410042183.

The spelling of 1195541978 in words is "one billion, one hundred ninety-five million, five hundred forty-one thousand, nine hundred seventy-eight".