1145178881 has 32 divisors (see below), whose sum is σ = 1470931968. Its totient is φ = 865650240.

The previous prime is 1145178877. The next prime is 1145178889. The reversal of 1145178881 is 1888715411.

It is not a de Polignac number, because 1145178881 - 2² = 1145178877 is a prime.

It is a super-2 number, since 2×1145178881² = 2622869338976824322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1145178889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518726 + ... + 520928.

It is an arithmetic number, because the mean of its divisors is an integer number (45966624).

Almost surely, 2^1145178881 is an apocalyptic number.

1145178881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1145178881 is a deficient number, since it is larger than the sum of its proper divisors (325753087).

1145178881 is a wasteful number, since it uses less digits than its factorization.

1145178881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421.

The product of its digits is 71680, while the sum is 44.

The square root of 1145178881 is about 33840.4917369710. The cubic root of 1145178881 is about 1046.2234340573.

The spelling of 1145178881 in words is "one billion, one hundred forty-five million, one hundred seventy-eight thousand, eight hundred eighty-one".