1987130 has 16 divisors (see below), whose sum is σ = 3787560. Its totient is φ = 748032.

The previous prime is 1987127. The next prime is 1987151. The reversal of 1987130 is 317891.

It can be written as a sum of positive squares in 4 ways, for example, as 1985281 + 1849 = 1409^2 + 43^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1987093 and 1987102.

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 7 ways as a sum of consecutive naturals, for example, 5675 + ... + 6014.

2^1987130 is an apocalyptic number.

1987130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1987130 is a deficient number, since it is larger than the sum of its proper divisors (1800430).

1987130 is a wasteful number, since it uses less digits than its factorization.

1987130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11713.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1987130 is about 1409.6559864024. The cubic root of 1987130 is about 125.7212701501.

The spelling of 1987130 in words is "one million, nine hundred eighty-seven thousand, one hundred thirty".