1987255 has 8 divisors (see below), whose sum is σ = 2461824. Its totient is φ = 1538400.

The previous prime is 1987247. The next prime is 1987261. The reversal of 1987255 is 5527891.

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

It is not a de Polignac number, because 1987255 - 2³ = 1987247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6256 + ... + 6565.

It is an arithmetic number, because the mean of its divisors is an integer number (307728).

2^1987255 is an apocalyptic number.

1987255 is a deficient number, since it is larger than the sum of its proper divisors (474569).

1987255 is a wasteful number, since it uses less digits than its factorization.

1987255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12857.

The product of its digits is 25200, while the sum is 37.

The square root of 1987255 is about 1409.7003227637. The cubic root of 1987255 is about 125.7239062516.

The spelling of 1987255 in words is "one million, nine hundred eighty-seven thousand, two hundred fifty-five".