1587489 has 16 divisors (see below), whose sum is σ = 2229120. Its totient is φ = 1003520.

The previous prime is 1587473. The next prime is 1587491. The reversal of 1587489 is 9847851.

It is a cyclic number.

It is not a de Polignac number, because 1587489 - 2⁴ = 1587473 is a prime.

Its product of digits (80640) is a multiple of the sum of its prime divisors (360).

It is a Curzon number.

1587489 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1587489.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6049 + ... + 6305.

It is an arithmetic number, because the mean of its divisors is an integer number (139320).

2^1587489 is an apocalyptic number.

It is an amenable number.

1587489 is a deficient number, since it is larger than the sum of its proper divisors (641631).

1587489 is a wasteful number, since it uses less digits than its factorization.

1587489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360.

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

The square root of 1587489 is about 1259.9559516110. The cubic root of 1587489 is about 116.6550582554.

The spelling of 1587489 in words is "one million, five hundred eighty-seven thousand, four hundred eighty-nine".