1172881 has 4 divisors (see below), whose sum is σ = 1241892. Its totient is φ = 1103872.

The previous prime is 1172867. The next prime is 1172893. The reversal of 1172881 is 1882711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 654481 = 720^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172881 - 2¹¹ = 1170833 is a prime.

It is a super-2 number, since 2×1172881² = 2751299680322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34480 + ... + 34513.

It is an arithmetic number, because the mean of its divisors is an integer number (310473).

2^1172881 is an apocalyptic number.

It is an amenable number.

1172881 is a deficient number, since it is larger than the sum of its proper divisors (69011).

1172881 is an equidigital number, since it uses as much as digits as its factorization.

1172881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69010.

The product of its digits is 896, while the sum is 28.

The square root of 1172881 is about 1082.9963065496. The cubic root of 1172881 is about 105.4592431833.

The spelling of 1172881 in words is "one million, one hundred seventy-two thousand, eight hundred eighty-one".