1641801 has 16 divisors (see below), whose sum is σ = 2570624. Its totient is φ = 912384.

The previous prime is 1641799. The next prime is 1641811. The reversal of 1641801 is 1081461.

It is not a de Polignac number, because 1641801 - 2¹ = 1641799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1641801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1641811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280 + ... + 1833.

It is an arithmetic number, because the mean of its divisors is an integer number (160664).

2^1641801 is an apocalyptic number.

It is an amenable number.

1641801 is a deficient number, since it is larger than the sum of its proper divisors (928823).

1641801 is a wasteful number, since it uses less digits than its factorization.

1641801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1641801 is about 1281.3278269046. The cubic root of 1641801 is about 117.9705231361.

It can be divided in two parts, 1641 and 801, that added together give a palindrome (2442).

The spelling of 1641801 in words is "one million, six hundred forty-one thousand, eight hundred one".