1171021896 has 48 divisors (see below), whose sum is σ = 3459839760. Its totient is φ = 354854880.

The previous prime is 1171021883. The next prime is 1171021921. The reversal of 1171021896 is 6981201711.

It is a super-2 number, since 2×1171021896² = 2742584561822869632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1171021896.

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 11 ways as a sum of consecutive naturals, for example, 738490 + ... + 740073.

It is an arithmetic number, because the mean of its divisors is an integer number (72079995).

Almost surely, 2^1171021896 is an apocalyptic number.

It is an amenable number.

1171021896 is an abundant number, since it is smaller than the sum of its proper divisors (2288817864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1171021896 is a wasteful number, since it uses less digits than its factorization.

1171021896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478586 (or 1478579 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

The square root of 1171021896 is about 34220.1971940549. The cubic root of 1171021896 is about 1054.0349345768.

The spelling of 1171021896 in words is "one billion, one hundred seventy-one million, twenty-one thousand, eight hundred ninety-six".