1641439 has 8 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 1573656.

The previous prime is 1641407. The next prime is 1641457. The reversal of 1641439 is 9341461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641439 - 2⁵ = 1641407 is a prime.

It is a Duffinian number.

1641439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214 + ... + 2860.

It is an arithmetic number, because the mean of its divisors is an integer number (213840).

2^1641439 is an apocalyptic number.

1641439 is a deficient number, since it is larger than the sum of its proper divisors (69281).

1641439 is an equidigital number, since it uses as much as digits as its factorization.

1641439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749.

The product of its digits is 2592, while the sum is 28.

The square root of 1641439 is about 1281.1865594050. The cubic root of 1641439 is about 117.9618520754.

It can be divided in two parts, 16414 and 39, that multiplied together give a triangular number (640146 = T₁₁₃₁).

The spelling of 1641439 in words is "one million, six hundred forty-one thousand, four hundred thirty-nine".