2906181 has 12 divisors (see below), whose sum is σ = 4230252. Its totient is φ = 1922496.

The previous prime is 2906179. The next prime is 2906207. The reversal of 2906181 is 1816092.

It can be written as a sum of positive squares in 2 ways, for example, as 1083681 + 1822500 = 1041^2 + 1350^2 .

It is not a de Polignac number, because 2906181 - 2¹ = 2906179 is a prime.

It is a super-2 number, since 2×2906181² = 16891776009522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2906131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (352521).

2^2906181 is an apocalyptic number.

It is an amenable number.

2906181 is a deficient number, since it is larger than the sum of its proper divisors (1324071).

2906181 is a wasteful number, since it uses less digits than its factorization.

2906181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2906181 is about 1704.7524747012. The cubic root of 2906181 is about 142.7055574480.

The spelling of 2906181 in words is "two million, nine hundred six thousand, one hundred eighty-one".