1641289 has 8 divisors (see below), whose sum is σ = 1778112. Its totient is φ = 1506000.

The previous prime is 1641281. The next prime is 1641301. The reversal of 1641289 is 9821461.

It is a happy number.

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

It is not a de Polignac number, because 1641289 - 2³ = 1641281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641289.

It is not an unprimeable number, because it can be changed into a prime (1641281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3012 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (222264).

2^1641289 is an apocalyptic number.

It is an amenable number.

1641289 is a deficient number, since it is larger than the sum of its proper divisors (136823).

1641289 is a wasteful number, since it uses less digits than its factorization.

1641289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767.

The product of its digits is 3456, while the sum is 31.

The square root of 1641289 is about 1281.1280185836. The cubic root of 1641289 is about 117.9582587208.

The spelling of 1641289 in words is "one million, six hundred forty-one thousand, two hundred eighty-nine".