1987249 has 8 divisors (see below), whose sum is σ = 2295648. Its totient is φ = 1700160.

The previous prime is 1987247. The next prime is 1987261. The reversal of 1987249 is 9427891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1987249 - 2¹ = 1987247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987241) by changing a digit.

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, 5127 + ... + 5500.

It is an arithmetic number, because the mean of its divisors is an integer number (286956).

2^1987249 is an apocalyptic number.

It is an amenable number.

1987249 is a deficient number, since it is larger than the sum of its proper divisors (308399).

1987249 is a wasteful number, since it uses less digits than its factorization.

1987249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655.

The product of its digits is 36288, while the sum is 40.

The square root of 1987249 is about 1409.6981946502. The cubic root of 1987249 is about 125.7237797213.

It can be divided in two parts, 198 and 7249, that added together give a palindrome (7447).

The spelling of 1987249 in words is "one million, nine hundred eighty-seven thousand, two hundred forty-nine".