4905181 has 2 divisors, whose sum is σ = 4905182. Its totient is φ = 4905180.

The previous prime is 4905179. The next prime is 4905209. The reversal of 4905181 is 1815094.

It is a happy number.

It is an a-pointer prime, because the next prime (4905209) can be obtained adding 4905181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4372281 + 532900 = 2091^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 4905181 - 2¹ = 4905179 is a prime.

It is a super-2 number, since 2×4905181² = 48121601285522, which contains 22 as substring.

Together with 4905179, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4905101) 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 as a sum of consecutive naturals, namely, 2452590 + 2452591.

It is an arithmetic number, because the mean of its divisors is an integer number (2452591).

Almost surely, 2^4905181 is an apocalyptic number.

It is an amenable number.

4905181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4905181 is an equidigital number, since it uses as much as digits as its factorization.

4905181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 4905181 is about 2214.7643215476. The cubic root of 4905181 is about 169.9097675706.

It can be divided in two parts, 490 and 5181, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 4905181 in words is "four million, nine hundred five thousand, one hundred eighty-one".