1589661 has 6 divisors (see below), whose sum is σ = 2296190. Its totient is φ = 1059768.

The previous prime is 1589657. The next prime is 1589663. The reversal of 1589661 is 1669851.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 164025 = 1194^2 + 405^2 .

It is not a de Polignac number, because 1589661 - 2² = 1589657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1589663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88306 + ... + 88323.

2^1589661 is an apocalyptic number.

It is an amenable number.

1589661 is a deficient number, since it is larger than the sum of its proper divisors (706529).

1589661 is a wasteful number, since it uses less digits than its factorization.

1589661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176635 (or 176632 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1589661 is about 1260.8175918823. The cubic root of 1589661 is about 116.7082364336.

It can be divided in two parts, 15 and 89661, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 1589661 in words is "one million, five hundred eighty-nine thousand, six hundred sixty-one".