1587897 has 16 divisors (see below), whose sum is σ = 2455680. Its totient is φ = 1012176.

The previous prime is 1587877. The next prime is 1587899. The reversal of 1587897 is 7987851.

It is not a de Polignac number, because 1587897 - 2¹² = 1583801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1587899) 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 15 ways as a sum of consecutive naturals, for example, 658 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (153480).

2^1587897 is an apocalyptic number.

It is an amenable number.

1587897 is a deficient number, since it is larger than the sum of its proper divisors (867783).

1587897 is a wasteful number, since it uses less digits than its factorization.

1587897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2583 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 1587897 is about 1260.1178516313. The cubic root of 1587897 is about 116.6650512248.

The spelling of 1587897 in words is "one million, five hundred eighty-seven thousand, eight hundred ninety-seven".