2159841 has 4 divisors (see below), whose sum is σ = 2879792. Its totient is φ = 1439892.

The previous prime is 2159831. The next prime is 2159881. The reversal of 2159841 is 1489512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2159841 - 2⁵ = 2159809 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2159799 and 2159808.

It is not an unprimeable number, because it can be changed into a prime (2159821) 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, 359971 + ... + 359976.

It is an arithmetic number, because the mean of its divisors is an integer number (719948).

2^2159841 is an apocalyptic number.

It is an amenable number.

2159841 is a deficient number, since it is larger than the sum of its proper divisors (719951).

2159841 is an equidigital number, since it uses as much as digits as its factorization.

2159841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719950.

The product of its digits is 2880, while the sum is 30.

The square root of 2159841 is about 1469.6397517759. The cubic root of 2159841 is about 129.2629095175.

The spelling of 2159841 in words is "two million, one hundred fifty-nine thousand, eight hundred forty-one".