4013905 has 16 divisors (see below), whose sum is σ = 5583744. Its totient is φ = 2712960.

The previous prime is 4013897. The next prime is 4013909. The reversal of 4013905 is 5093104.

It is not a de Polignac number, because 4013905 - 2³ = 4013897 is a prime.

It is a super-2 number, since 2×4013905² = 32222866698050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4013909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1770 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (348984).

Almost surely, 2^4013905 is an apocalyptic number.

It is an amenable number.

4013905 is a deficient number, since it is larger than the sum of its proper divisors (1569839).

4013905 is a wasteful number, since it uses less digits than its factorization.

4013905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 4013905 is about 2003.4732341611. The cubic root of 4013905 is about 158.9238325638.

The spelling of 4013905 in words is "four million, thirteen thousand, nine hundred five".