1189112551 has 4 divisors (see below), whose sum is σ = 1297213704. Its totient is φ = 1081011400.

The previous prime is 1189112527. The next prime is 1189112563. The reversal of 1189112551 is 1552119811.

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 1189112551 - 2⁷ = 1189112423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189113551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54050560 + ... + 54050581.

It is an arithmetic number, because the mean of its divisors is an integer number (324303426).

Almost surely, 2^1189112551 is an apocalyptic number.

1189112551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1189112551 is a deficient number, since it is larger than the sum of its proper divisors (108101153).

1189112551 is a wasteful number, since it uses less digits than its factorization.

1189112551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108101152.

The product of its digits is 3600, while the sum is 34.

The square root of 1189112551 is about 34483.5112916304. The cubic root of 1189112551 is about 1059.4350112986.

It can be divided in two parts, 11891 and 12551, that added together give a palindrome (24442).

The spelling of 1189112551 in words is "one billion, one hundred eighty-nine million, one hundred twelve thousand, five hundred fifty-one".