1187135144 has 32 divisors (see below), whose sum is σ = 2399192040. Its totient is φ = 547430400.

The previous prime is 1187135093. The next prime is 1187135149. The reversal of 1187135144 is 4415317811.

It can be written as a sum of positive squares in 4 ways, for example, as 761208100 + 425927044 = 27590^2 + 20638^2 .

It is not an unprimeable number, because it can be changed into a prime (1187135149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133064 + ... + 141704.

Almost surely, 2^1187135144 is an apocalyptic number.

It is an amenable number.

1187135144 is an abundant number, since it is smaller than the sum of its proper divisors (1212056896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1187135144 is a wasteful number, since it uses less digits than its factorization.

1187135144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9981 (or 9977 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 1187135144 is about 34454.8275862759. The cubic root of 1187135144 is about 1058.8474312247.

The spelling of 1187135144 in words is "one billion, one hundred eighty-seven million, one hundred thirty-five thousand, one hundred forty-four".