1987118 has 8 divisors (see below), whose sum is σ = 3406512. Its totient is φ = 851616.

The previous prime is 1987099. The next prime is 1987121. The reversal of 1987118 is 8117891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70955 + ... + 70982.

It is an arithmetic number, because the mean of its divisors is an integer number (425814).

2^1987118 is an apocalyptic number.

1987118 is a deficient number, since it is larger than the sum of its proper divisors (1419394).

1987118 is a wasteful number, since it uses less digits than its factorization.

1987118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141946.

The product of its digits is 4032, while the sum is 35.

The square root of 1987118 is about 1409.6517300383. The cubic root of 1987118 is about 125.7210170786.

The spelling of 1987118 in words is "one million, nine hundred eighty-seven thousand, one hundred eighteen".