1987059 has 4 divisors (see below), whose sum is σ = 2649416. Its totient is φ = 1324704.

The previous prime is 1987057. The next prime is 1987067. The reversal of 1987059 is 9507891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9507891 = 3 ⋅3169297.

It is not a de Polignac number, because 1987059 - 2¹ = 1987057 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987057) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 331174 + ... + 331179.

It is an arithmetic number, because the mean of its divisors is an integer number (662354).

2^1987059 is an apocalyptic number.

1987059 is a deficient number, since it is larger than the sum of its proper divisors (662357).

1987059 is an equidigital number, since it uses as much as digits as its factorization.

1987059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662356.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1987059 is about 1409.6308027281. The cubic root of 1987059 is about 125.7197727952.

It can be divided in two parts, 19 and 87059, that added together give a palindrome (87078).

The spelling of 1987059 in words is "one million, nine hundred eighty-seven thousand, fifty-nine".