1197921158 has 64 divisors (see below), whose sum is σ = 2274324480. Its totient is φ = 461635200.

The previous prime is 1197921143. The next prime is 1197921181. The reversal of 1197921158 is 8511297911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435668 + ... + 438408.

It is an arithmetic number, because the mean of its divisors is an integer number (35536320).

Almost surely, 2^1197921158 is an apocalyptic number.

1197921158 is a deficient number, since it is larger than the sum of its proper divisors (1076403322).

1197921158 is a wasteful number, since it uses less digits than its factorization.

1197921158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853.

The product of its digits is 45360, while the sum is 44.

The square root of 1197921158 is about 34610.9976452572. The cubic root of 1197921158 is about 1062.0445758070.

The spelling of 1197921158 in words is "one billion, one hundred ninety-seven million, nine hundred twenty-one thousand, one hundred fifty-eight".