1641285 has 12 divisors (see below), whose sum is σ = 2844972. Its totient is φ = 875328.

The previous prime is 1641281. The next prime is 1641301. The reversal of 1641285 is 5821461.

It can be written as a sum of positive squares in 2 ways, for example, as 613089 + 1028196 = 783^2 + 1014^2 .

It is not a de Polignac number, because 1641285 - 2² = 1641281 is a prime.

It is a Curzon number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 18192 + ... + 18281.

It is an arithmetic number, because the mean of its divisors is an integer number (237081).

2^1641285 is an apocalyptic number.

1641285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641285 is a deficient number, since it is larger than the sum of its proper divisors (1203687).

1641285 is a wasteful number, since it uses less digits than its factorization.

1641285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36484 (or 36481 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1641285 is about 1281.1264574584. The cubic root of 1641285 is about 117.9581628950.

The spelling of 1641285 in words is "one million, six hundred forty-one thousand, two hundred eighty-five".