1195021845987 has 4 divisors (see below), whose sum is σ = 1593362461320. Its totient is φ = 796681230656.

The previous prime is 1195021845971. The next prime is 1195021845991. The reversal of 1195021845987 is 7895481205911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1195021845987 - 2⁴ = 1195021845971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1195021845987.

It is not an unprimeable number, because it can be changed into a prime (1195021845937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199170307662 + ... + 199170307667.

It is an arithmetic number, because the mean of its divisors is an integer number (398340615330).

Almost surely, 2^{1195021845987} is an apocalyptic number.

1195021845987 is a deficient number, since it is larger than the sum of its proper divisors (398340615333).

1195021845987 is an equidigital number, since it uses as much as digits as its factorization.

1195021845987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398340615332.

The product of its (nonzero) digits is 7257600, while the sum is 60.

The spelling of 1195021845987 in words is "one trillion, one hundred ninety-five billion, twenty-one million, eight hundred forty-five thousand, nine hundred eighty-seven".