1987562 has 4 divisors (see below), whose sum is σ = 2981346. Its totient is φ = 993780.

The previous prime is 1987549. The next prime is 1987577. The reversal of 1987562 is 2657891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1661521 + 326041 = 1289^2 + 571^2 .

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 as a sum of consecutive naturals, namely, 496889 + ... + 496892.

2^1987562 is an apocalyptic number.

1987562 is a deficient number, since it is larger than the sum of its proper divisors (993784).

1987562 is an equidigital number, since it uses as much as digits as its factorization.

1987562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993783.

The product of its digits is 30240, while the sum is 38.

The square root of 1987562 is about 1409.8092069496. The cubic root of 1987562 is about 125.7303800479.

The spelling of 1987562 in words is "one million, nine hundred eighty-seven thousand, five hundred sixty-two".