1442881187 has 4 divisors (see below), whose sum is σ = 1574052216. Its totient is φ = 1311710160.

The previous prime is 1442881183. The next prime is 1442881189. The reversal of 1442881187 is 7811882441.

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 1442881187 - 2² = 1442881183 is a prime.

It is a super-2 number, since 2×1442881187² = 4163812239597057938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1442881183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65585498 + ... + 65585519.

It is an arithmetic number, because the mean of its divisors is an integer number (393513054).

Almost surely, 2^1442881187 is an apocalyptic number.

1442881187 is a deficient number, since it is larger than the sum of its proper divisors (131171029).

1442881187 is a wasteful number, since it uses less digits than its factorization.

1442881187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131171028.

The product of its digits is 114688, while the sum is 44.

The square root of 1442881187 is about 37985.2759237050. The cubic root of 1442881187 is about 1129.9958720188.

The spelling of 1442881187 in words is "one billion, four hundred forty-two million, eight hundred eighty-one thousand, one hundred eighty-seven".