1125381187 has 6 divisors (see below), whose sum is σ = 1309116948. Its totient is φ = 964612404.

The previous prime is 1125381151. The next prime is 1125381197. The reversal of 1125381187 is 7811835211.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1125381187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125381197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11483433 + ... + 11483530.

It is an arithmetic number, because the mean of its divisors is an integer number (218186158).

Almost surely, 2^1125381187 is an apocalyptic number.

1125381187 is a deficient number, since it is larger than the sum of its proper divisors (183735761).

1125381187 is an equidigital number, since it uses as much as digits as its factorization.

1125381187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22966977 (or 22966970 counting only the distinct ones).

The product of its digits is 13440, while the sum is 37.

The square root of 1125381187 is about 33546.7015815266. The cubic root of 1125381187 is about 1040.1593650631.

The spelling of 1125381187 in words is "one billion, one hundred twenty-five million, three hundred eighty-one thousand, one hundred eighty-seven".