1153881 has 12 divisors (see below), whose sum is σ = 1724580. Its totient is φ = 742560.

The previous prime is 1153871. The next prime is 1153891. The reversal of 1153881 is 1883511.

It is an interprime number because it is at equal distance from previous prime (1153871) and next prime (1153891).

It can be written as a sum of positive squares in 2 ways, for example, as 793881 + 360000 = 891^2 + 600^2 .

It is not a de Polignac number, because 1153881 - 2⁵ = 1153849 is a prime.

It is a super-2 number, since 2×1153881² = 2662882724322, which contains 22 as substring.

It is a Curzon number.

1153881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1153811) by changing a digit.

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, 1950 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (143715).

2^1153881 is an apocalyptic number.

It is an amenable number.

1153881 is a deficient number, since it is larger than the sum of its proper divisors (570699).

1153881 is a wasteful number, since it uses less digits than its factorization.

1153881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4453 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1153881 is about 1074.1885309386. The cubic root of 1153881 is about 104.8866804668.

Subtracting from 1153881 its product of digits (960), we obtain a triangular number (1152921 = T₁₅₁₈).

The spelling of 1153881 in words is "one million, one hundred fifty-three thousand, eight hundred eighty-one".