1999241 has 4 divisors (see below), whose sum is σ = 2013972. Its totient is φ = 1984512.

The previous prime is 1999223. The next prime is 1999243. The reversal of 1999241 is 1429991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1429991 = 863 ⋅1657.

It can be written as a sum of positive squares in 2 ways, for example, as 606841 + 1392400 = 779^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999241 - 2⁶ = 1999177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999243) 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, 7160 + ... + 7433.

It is an arithmetic number, because the mean of its divisors is an integer number (503493).

2^1999241 is an apocalyptic number.

It is an amenable number.

1999241 is a deficient number, since it is larger than the sum of its proper divisors (14731).

1999241 is a wasteful number, since it uses less digits than its factorization.

1999241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14730.

The product of its digits is 5832, while the sum is 35.

The square root of 1999241 is about 1413.9451898854. The cubic root of 1999241 is about 125.9761649716.

The spelling of 1999241 in words is "one million, nine hundred ninety-nine thousand, two hundred forty-one".