1987521124 has 12 divisors (see below), whose sum is σ = 3479804524. Its totient is φ = 993291264.

The previous prime is 1987521113. The next prime is 1987521131. The reversal of 1987521124 is 4211257891.

It can be written as a sum of positive squares in 2 ways, for example, as 209380900 + 1778140224 = 14470^2 + 42168^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107709 + ... + 124804.

Almost surely, 2^1987521124 is an apocalyptic number.

It is an amenable number.

1987521124 is a deficient number, since it is larger than the sum of its proper divisors (1492283400).

1987521124 is a wasteful number, since it uses less digits than its factorization.

1987521124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234654 (or 234652 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 1987521124 is about 44581.6231647077. The cubic root of 1987521124 is about 1257.2951812253.

The spelling of 1987521124 in words is "one billion, nine hundred eighty-seven million, five hundred twenty-one thousand, one hundred twenty-four".