3881145 has 8 divisors (see below), whose sum is σ = 6209856. Its totient is φ = 2069936.

The previous prime is 3881131. The next prime is 3881147. The reversal of 3881145 is 5411883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3881145 - 2⁵ = 3881113 is a prime.

It is a super-2 number, since 2×3881145² = 30126573022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3881147) 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 7 ways as a sum of consecutive naturals, for example, 129357 + ... + 129386.

It is an arithmetic number, because the mean of its divisors is an integer number (776232).

Almost surely, 2^3881145 is an apocalyptic number.

It is an amenable number.

3881145 is a deficient number, since it is larger than the sum of its proper divisors (2328711).

3881145 is a wasteful number, since it uses less digits than its factorization.

3881145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258751.

The product of its digits is 3840, while the sum is 30.

The square root of 3881145 is about 1970.0621817598. The cubic root of 3881145 is about 157.1520157984.

The spelling of 3881145 in words is "three million, eight hundred eighty-one thousand, one hundred forty-five".