1641401 has 4 divisors (see below), whose sum is σ = 1737972. Its totient is φ = 1544832.

The previous prime is 1641389. The next prime is 1641403. The reversal of 1641401 is 1041461.

1641401 = 203² + 204² + ... + 236².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 249001 = 1180^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641401 - 2¹⁴ = 1625017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 96553 = 1641401 / (1 + 6 + 4 + 1 + 4 + 0 + 1).

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 1641401.

It is not an unprimeable number, because it can be changed into a prime (1641403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48260 + ... + 48293.

It is an arithmetic number, because the mean of its divisors is an integer number (434493).

2^1641401 is an apocalyptic number.

It is an amenable number.

1641401 is a deficient number, since it is larger than the sum of its proper divisors (96571).

1641401 is an equidigital number, since it uses as much as digits as its factorization.

1641401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96570.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1641401 is about 1281.1717293166. The cubic root of 1641401 is about 117.9609417796.

Adding to 1641401 its reverse (1041461), we get a palindrome (2682862).

The spelling of 1641401 in words is "one million, six hundred forty-one thousand, four hundred one".