2985181 has 4 divisors (see below), whose sum is σ = 2988700. Its totient is φ = 2981664.

The previous prime is 2985179. The next prime is 2985187. The reversal of 2985181 is 1815892.

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 1359556 + 1625625 = 1166^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2985181 - 2¹ = 2985179 is a prime.

It is a super-2 number, since 2×2985181² = 17822611205522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2985187) 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, 385 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (747175).

2^2985181 is an apocalyptic number.

It is an amenable number.

2985181 is a deficient number, since it is larger than the sum of its proper divisors (3519).

2985181 is a wasteful number, since it uses less digits than its factorization.

2985181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518.

The product of its digits is 5760, while the sum is 34.

The square root of 2985181 is about 1727.7676348398. The cubic root of 2985181 is about 143.9870905351.

The spelling of 2985181 in words is "two million, nine hundred eighty-five thousand, one hundred eighty-one".