1987485 has 8 divisors (see below), whose sum is σ = 3180000. Its totient is φ = 1059984.

The previous prime is 1987483. The next prime is 1987501. The reversal of 1987485 is 5847891.

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

It is not a de Polignac number, because 1987485 - 2¹ = 1987483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987481) 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 7 ways as a sum of consecutive naturals, for example, 66235 + ... + 66264.

It is an arithmetic number, because the mean of its divisors is an integer number (397500).

2^1987485 is an apocalyptic number.

1987485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1987485 is a deficient number, since it is larger than the sum of its proper divisors (1192515).

1987485 is a wasteful number, since it uses less digits than its factorization.

1987485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132507.

The product of its digits is 80640, while the sum is 42.

The square root of 1987485 is about 1409.7818980254. The cubic root of 1987485 is about 125.7287563896.

The spelling of 1987485 in words is "one million, nine hundred eighty-seven thousand, four hundred eighty-five".