3905481 has 4 divisors (see below), whose sum is σ = 5207312. Its totient is φ = 2603652.

The previous prime is 3905477. The next prime is 3905491. The reversal of 3905481 is 1845093.

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: 1845093 = 3 ⋅615031.

It is not a de Polignac number, because 3905481 - 2² = 3905477 is a prime.

It is a super-2 number, since 2×3905481² = 30505563682722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3905441) 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, 650911 + ... + 650916.

It is an arithmetic number, because the mean of its divisors is an integer number (1301828).

Almost surely, 2^3905481 is an apocalyptic number.

It is an amenable number.

3905481 is a deficient number, since it is larger than the sum of its proper divisors (1301831).

3905481 is a wasteful number, since it uses less digits than its factorization.

3905481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301830.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 3905481 is about 1976.2289847080. The cubic root of 3905481 is about 157.4797958462.

The spelling of 3905481 in words is "three million, nine hundred five thousand, four hundred eighty-one".