1189220135 has 4 divisors (see below), whose sum is σ = 1427064168. Its totient is φ = 951376104.

The previous prime is 1189220113. The next prime is 1189220161. The reversal of 1189220135 is 5310229811.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1189220135 - 2²⁴ = 1172442919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118922009 + ... + 118922018.

It is an arithmetic number, because the mean of its divisors is an integer number (356766042).

Almost surely, 2^1189220135 is an apocalyptic number.

1189220135 is a deficient number, since it is larger than the sum of its proper divisors (237844033).

1189220135 is an equidigital number, since it uses as much as digits as its factorization.

1189220135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237844032.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1189220135 is about 34485.0711902991. The cubic root of 1189220135 is about 1059.4669608448.

Adding to 1189220135 its reverse (5310229811), we get a palindrome (6499449946).

The spelling of 1189220135 in words is "one billion, one hundred eighty-nine million, two hundred twenty thousand, one hundred thirty-five".