1487665 has 4 divisors (see below), whose sum is σ = 1785204. Its totient is φ = 1190128.

The previous prime is 1487641. The next prime is 1487711. The reversal of 1487665 is 5667841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 1308736 = 423^2 + 1144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487665 - 2¹⁵ = 1454897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 148762 + ... + 148771.

It is an arithmetic number, because the mean of its divisors is an integer number (446301).

2^1487665 is an apocalyptic number.

It is an amenable number.

1487665 is a deficient number, since it is larger than the sum of its proper divisors (297539).

1487665 is an equidigital number, since it uses as much as digits as its factorization.

1487665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297538.

The product of its digits is 40320, while the sum is 37.

The square root of 1487665 is about 1219.6987332944. The cubic root of 1487665 is about 114.1567813085.

It can be divided in two parts, 14876 and 65, that added together give a palindrome (14941).

The spelling of 1487665 in words is "one million, four hundred eighty-seven thousand, six hundred sixty-five".