1641611 has 4 divisors (see below), whose sum is σ = 1679832. Its totient is φ = 1603392.

The previous prime is 1641593. The next prime is 1641613. The reversal of 1641611 is 1161461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641611 - 2¹⁴ = 1625227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19046 + ... + 19131.

It is an arithmetic number, because the mean of its divisors is an integer number (419958).

2^1641611 is an apocalyptic number.

1641611 is a deficient number, since it is larger than the sum of its proper divisors (38221).

1641611 is an equidigital number, since it uses as much as digits as its factorization.

1641611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38220.

The product of its digits is 144, while the sum is 20.

The square root of 1641611 is about 1281.2536829215. The cubic root of 1641611 is about 117.9659721858.

The spelling of 1641611 in words is "one million, six hundred forty-one thousand, six hundred eleven".