2172841 has 8 divisors (see below), whose sum is σ = 2415744. Its totient is φ = 1937520.

The previous prime is 2172839. The next prime is 2172847. The reversal of 2172841 is 1482712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172841 - 2¹ = 2172839 is a prime.

It is a super-2 number, since 2×2172841² = 9442476022562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (301968).

2^2172841 is an apocalyptic number.

It is an amenable number.

2172841 is a deficient number, since it is larger than the sum of its proper divisors (242903).

2172841 is a wasteful number, since it uses less digits than its factorization.

2172841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791.

The product of its digits is 896, while the sum is 25.

The square root of 2172841 is about 1474.0559690867. The cubic root of 2172841 is about 129.5217337543.

The spelling of 2172841 in words is "two million, one hundred seventy-two thousand, eight hundred forty-one".