1139198 has 4 divisors (see below), whose sum is σ = 1708800. Its totient is φ = 569598.

The previous prime is 1139197. The next prime is 1139227. The reversal of 1139198 is 8919311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8919311 = 283 ⋅31517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284798 + ... + 284801.

It is an arithmetic number, because the mean of its divisors is an integer number (427200).

2^1139198 is an apocalyptic number.

1139198 is a deficient number, since it is larger than the sum of its proper divisors (569602).

1139198 is an equidigital number, since it uses as much as digits as its factorization.

1139198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569601.

The product of its digits is 1944, while the sum is 32.

The square root of 1139198 is about 1067.3321882151. The cubic root of 1139198 is about 104.4398897298.

It can be divided in two parts, 1139 and 198, that multiplied together give a palindrome (225522).

The spelling of 1139198 in words is "one million, one hundred thirty-nine thousand, one hundred ninety-eight".