1170145881 has 6 divisors (see below), whose sum is σ = 1690210730. Its totient is φ = 780097248.

The previous prime is 1170145783. The next prime is 1170145883. The reversal of 1170145881 is 1885410711.

1170145881 is a `hidden beast` number, since 1 + 1 + 70 + 1 + 4 + 588 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1074790656 + 95355225 = 32784^2 + 9765^2 .

It is not a de Polignac number, because 1170145881 - 2³⁰ = 96404057 is a prime.

It is a super-2 number, since 2×1170145881² = 2738482765642532322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1170145883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65008096 + ... + 65008113.

Almost surely, 2^1170145881 is an apocalyptic number.

It is an amenable number.

1170145881 is a deficient number, since it is larger than the sum of its proper divisors (520064849).

1170145881 is a wasteful number, since it uses less digits than its factorization.

1170145881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130016215 (or 130016212 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 36.

The square root of 1170145881 is about 34207.3951215231. The cubic root of 1170145881 is about 1053.7720357765.

The spelling of 1170145881 in words is "one billion, one hundred seventy million, one hundred forty-five thousand, eight hundred eighty-one".