3948181 has 4 divisors (see below), whose sum is σ = 4156000. Its totient is φ = 3740364.

The previous prime is 3948179. The next prime is 3948187. The reversal of 3948181 is 1818493.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1818493 = 151 ⋅12043.

It is a cyclic number.

It is not a de Polignac number, because 3948181 - 2¹ = 3948179 is a prime.

It is a super-2 number, since 2×3948181² = 31176266417522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3948187) 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, 103881 + ... + 103918.

It is an arithmetic number, because the mean of its divisors is an integer number (1039000).

Almost surely, 2^3948181 is an apocalyptic number.

It is an amenable number.

3948181 is a deficient number, since it is larger than the sum of its proper divisors (207819).

3948181 is a wasteful number, since it uses less digits than its factorization.

3948181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207818.

The product of its digits is 6912, while the sum is 34.

The square root of 3948181 is about 1987.0030196253. The cubic root of 3948181 is about 158.0516441762.

The spelling of 3948181 in words is "three million, nine hundred forty-eight thousand, one hundred eighty-one".