1987395 has 16 divisors (see below), whose sum is σ = 3248640. Its totient is φ = 1037024.

The previous prime is 1987373. The next prime is 1987411. The reversal of 1987395 is 5937891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1987395 - 2¹⁵ = 1954627 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 705 + ... + 2114.

It is an arithmetic number, because the mean of its divisors is an integer number (203040).

2^1987395 is an apocalyptic number.

1987395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1987395 is a deficient number, since it is larger than the sum of its proper divisors (1261245).

1987395 is a wasteful number, since it uses less digits than its factorization.

1987395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874.

The product of its digits is 68040, while the sum is 42.

The square root of 1987395 is about 1409.7499778329. The cubic root of 1987395 is about 125.7268585541.

The spelling of 1987395 in words is "one million, nine hundred eighty-seven thousand, three hundred ninety-five".