3945481 has 4 divisors (see below), whose sum is σ = 3957012. Its totient is φ = 3933952.

The previous prime is 3945467. The next prime is 3945527. The reversal of 3945481 is 1845493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1845493 = 13 ⋅141961.

It can be written as a sum of positive squares in 2 ways, for example, as 2611456 + 1334025 = 1616^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 3945481 - 2⁵ = 3945449 is a prime.

It is a super-2 number, since 2×3945481² = 31133640642722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3943481) 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, 5236 + ... + 5941.

It is an arithmetic number, because the mean of its divisors is an integer number (989253).

Almost surely, 2^3945481 is an apocalyptic number.

It is an amenable number.

3945481 is a deficient number, since it is larger than the sum of its proper divisors (11531).

3945481 is a wasteful number, since it uses less digits than its factorization.

3945481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530.

The product of its digits is 17280, while the sum is 34.

The square root of 3945481 is about 1986.3234882566. The cubic root of 3945481 is about 158.0156076020.

The spelling of 3945481 in words is "three million, nine hundred forty-five thousand, four hundred eighty-one".