1489665 has 16 divisors (see below), whose sum is σ = 2435328. Its totient is φ = 777216.

The previous prime is 1489661. The next prime is 1489667. The reversal of 1489665 is 5669841.

It is not a de Polignac number, because 1489665 - 2² = 1489661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1489661) 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, 352 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (152208).

It is a Poulet number, since it divides 2^1489664-1.

2^1489665 is an apocalyptic number.

1489665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1489665 is the 705-th octagonal number.

It is an amenable number.

1489665 is a deficient number, since it is larger than the sum of its proper divisors (945663).

1489665 is a wasteful number, since it uses less digits than its factorization.

1489665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168.

The product of its digits is 51840, while the sum is 39.

The square root of 1489665 is about 1220.5183325129. The cubic root of 1489665 is about 114.2079154292.

The spelling of 1489665 in words is "one million, four hundred eighty-nine thousand, six hundred sixty-five".