1641199 has 4 divisors (see below), whose sum is σ = 1875664. Its totient is φ = 1406736.

The previous prime is 1641161. The next prime is 1641217. The reversal of 1641199 is 9911461.

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 1641199 - 2¹¹ = 1639151 is a prime.

1641199 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641799) 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, 117222 + ... + 117235.

It is an arithmetic number, because the mean of its divisors is an integer number (468916).

2^1641199 is an apocalyptic number.

1641199 is a deficient number, since it is larger than the sum of its proper divisors (234465).

1641199 is an equidigital number, since it uses as much as digits as its factorization.

1641199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234464.

The product of its digits is 1944, while the sum is 31.

The square root of 1641199 is about 1281.0928928068. The cubic root of 1641199 is about 117.9561026030.

The spelling of 1641199 in words is "one million, six hundred forty-one thousand, one hundred ninety-nine".