1587487 has 8 divisors (see below), whose sum is σ = 1741392. Its totient is φ = 1435200.

The previous prime is 1587473. The next prime is 1587491. The reversal of 1587487 is 7847851.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1587487 is a prime.

It is a super-2 number, since 2×1587487² = 5040229950338, which contains 22 as substring.

It is a Duffinian number.

1587487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587407) 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, 2787 + ... + 3307.

It is an arithmetic number, because the mean of its divisors is an integer number (217674).

2^1587487 is an apocalyptic number.

1587487 is a deficient number, since it is larger than the sum of its proper divisors (153905).

1587487 is a wasteful number, since it uses less digits than its factorization.

1587487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its digits is 62720, while the sum is 40.

The square root of 1587487 is about 1259.9551579322. The cubic root of 1587487 is about 116.6550092661.

The spelling of 1587487 in words is "one million, five hundred eighty-seven thousand, four hundred eighty-seven".