2604181 has 4 divisors (see below), whose sum is σ = 2614572. Its totient is φ = 2593792.

The previous prime is 2604167. The next prime is 2604187. The reversal of 2604181 is 1814062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1814062 = 2 ⋅907031.

It can be written as a sum of positive squares in 2 ways, for example, as 2387025 + 217156 = 1545^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 2604181 - 2⁷ = 2604053 is a prime.

It is a super-2 number, since 2×2604181² = 13563517361522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4810 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (653643).

2^2604181 is an apocalyptic number.

It is an amenable number.

2604181 is a deficient number, since it is larger than the sum of its proper divisors (10391).

2604181 is a wasteful number, since it uses less digits than its factorization.

2604181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10390.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2604181 is about 1613.7475019345. The cubic root of 2604181 is about 137.5805544508.

The spelling of 2604181 in words is "two million, six hundred four thousand, one hundred eighty-one".