4013805 has 8 divisors (see below), whose sum is σ = 6422112. Its totient is φ = 2140688.

The previous prime is 4013783. The next prime is 4013827. The reversal of 4013805 is 5083104.

It is an interprime number because it is at equal distance from previous prime (4013783) and next prime (4013827).

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 4013805 - 2¹³ = 4005613 is a prime.

It is a super-2 number, since 2×4013805² = 32221261156050, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133779 + ... + 133808.

It is an arithmetic number, because the mean of its divisors is an integer number (802764).

Almost surely, 2^4013805 is an apocalyptic number.

It is an amenable number.

4013805 is a deficient number, since it is larger than the sum of its proper divisors (2408307).

4013805 is a wasteful number, since it uses less digits than its factorization.

4013805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267595.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 4013805 is about 2003.4482773458. The cubic root of 4013805 is about 158.9225127755.

Adding to 4013805 its reverse (5083104), we get a palindrome (9096909).

The spelling of 4013805 in words is "four million, thirteen thousand, eight hundred five".