1201876665 has 96 divisors (see below), whose sum is σ = 2239405056. Its totient is φ = 549120000.

The previous prime is 1201876651. The next prime is 1201876699. The reversal of 1201876665 is 5666781021.

It is not a de Polignac number, because 1201876665 - 2⁴ = 1201876649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2306605 + ... + 2307125.

It is an arithmetic number, because the mean of its divisors is an integer number (23327136).

Almost surely, 2^1201876665 is an apocalyptic number.

1201876665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201876665 is a deficient number, since it is larger than the sum of its proper divisors (1037528391).

1201876665 is a wasteful number, since it uses less digits than its factorization.

1201876665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1201876665 is about 34668.0928953411. The cubic root of 1201876665 is about 1063.2122401408.

The spelling of 1201876665 in words is "one billion, two hundred one million, eight hundred seventy-six thousand, six hundred sixty-five".