1189881 has 48 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 576000.

The previous prime is 1189879. The next prime is 1189891. The reversal of 1189881 is 1889811.

It is not a de Polignac number, because 1189881 - 2¹ = 1189879 is a prime.

It is a super-2 number, since 2×1189881² = 2831633588322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1189801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11731 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (47736).

2^1189881 is an apocalyptic number.

1189881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1189881 is a deficient number, since it is larger than the sum of its proper divisors (1101447).

1189881 is a wasteful number, since it uses less digits than its factorization.

1189881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 139 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 1189881 is about 1090.8166665393. The cubic root of 1189881 is about 105.9663177664.

It can be divided in two parts, 118 and 9881, that added together give a palindrome (9999).

The spelling of 1189881 in words is "one million, one hundred eighty-nine thousand, eight hundred eighty-one".