1198881 has 30 divisors (see below), whose sum is σ = 1936242. Its totient is φ = 738720.

The previous prime is 1198877. The next prime is 1198903. The reversal of 1198881 is 1888911.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 467856 = 855^2 + 684^2 .

It is not a de Polignac number, because 1198881 - 2² = 1198877 is a prime.

It is a super-2 number, since 2×1198881² = 2874631304322, which contains 22 as substring.

1198881 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198811) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 29221 + ... + 29261.

2^1198881 is an apocalyptic number.

It is an amenable number.

1198881 is a deficient number, since it is larger than the sum of its proper divisors (737361).

1198881 is an equidigital number, since it uses as much as digits as its factorization.

1198881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 63 counting only the distinct ones).

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

The square root of 1198881 is about 1094.9342446010. The cubic root of 1198881 is about 106.2328156753.

The spelling of 1198881 in words is "one million, one hundred ninety-eight thousand, eight hundred eighty-one".