2178241 has 6 divisors (see below), whose sum is σ = 2358870. Its totient is φ = 2010528.

The previous prime is 2178223. The next prime is 2178257. The reversal of 2178241 is 1428712.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14400 + 2163841 = 120^2 + 1471^2 .

It is not a de Polignac number, because 2178241 - 2¹¹ = 2176193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6276 + ... + 6613.

It is an arithmetic number, because the mean of its divisors is an integer number (393145).

2^2178241 is an apocalyptic number.

It is an amenable number.

2178241 is a deficient number, since it is larger than the sum of its proper divisors (180629).

2178241 is a wasteful number, since it uses less digits than its factorization.

2178241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12915 (or 12902 counting only the distinct ones).

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

The square root of 2178241 is about 1475.8865132523. The cubic root of 2178241 is about 129.6289418991.

The spelling of 2178241 in words is "two million, one hundred seventy-eight thousand, two hundred forty-one".