4021913 has 8 divisors (see below), whose sum is σ = 4672320. Its totient is φ = 3390480.

The previous prime is 4021907. The next prime is 4021933. The reversal of 4021913 is 3191204.

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 4021913 - 2⁸ = 4021657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4283 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (584040).

Almost surely, 2^4021913 is an apocalyptic number.

It is an amenable number.

4021913 is a deficient number, since it is larger than the sum of its proper divisors (650407).

4021913 is an equidigital number, since it uses as much as digits as its factorization.

4021913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 4021913 is about 2005.4707676753. The cubic root of 4021913 is about 159.0294501308.

The spelling of 4021913 in words is "four million, twenty-one thousand, nine hundred thirteen".