2197841 has 4 divisors (see below), whose sum is σ = 2200884. Its totient is φ = 2194800.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197841 is 1487912.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 1380625 = 904^2 + 1175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197841 is a prime.

It is a super-2 number, since 2×2197841² = 9661010122562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2197798 and 2197807.

It is not an unprimeable number, because it can be changed into a prime (2197847) 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, 251 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (550221).

2^2197841 is an apocalyptic number.

It is an amenable number.

2197841 is a deficient number, since it is larger than the sum of its proper divisors (3043).

2197841 is a wasteful number, since it uses less digits than its factorization.

2197841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042.

The product of its digits is 4032, while the sum is 32.

The square root of 2197841 is about 1482.5117200211. The cubic root of 2197841 is about 130.0165856551.

The spelling of 2197841 in words is "two million, one hundred ninety-seven thousand, eight hundred forty-one".