4405181 has 4 divisors (see below), whose sum is σ = 4805664. Its totient is φ = 4004700.

The previous prime is 4405157. The next prime is 4405189. The reversal of 4405181 is 1815044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4405181 - 2¹⁰ = 4404157 is a prime.

It is a super-2 number, since 2×4405181² = 38811239285522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4405189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200225 + ... + 200246.

It is an arithmetic number, because the mean of its divisors is an integer number (1201416).

Almost surely, 2^4405181 is an apocalyptic number.

It is an amenable number.

4405181 is a deficient number, since it is larger than the sum of its proper divisors (400483).

4405181 is a wasteful number, since it uses less digits than its factorization.

4405181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400482.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 4405181 is about 2098.8523054279. The cubic root of 4405181 is about 163.9285456121.

The spelling of 4405181 in words is "four million, four hundred five thousand, one hundred eighty-one".