4148021 has 4 divisors (see below), whose sum is σ = 4172172. Its totient is φ = 4123872.

The previous prime is 4148009. The next prime is 4148029. The reversal of 4148021 is 1208414.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2907025 + 1240996 = 1705^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 4148021 - 2¹⁴ = 4131637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4147984 and 4148002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4148029) 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, 11816 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (1043043).

Almost surely, 2^4148021 is an apocalyptic number.

It is an amenable number.

4148021 is a deficient number, since it is larger than the sum of its proper divisors (24151).

4148021 is a wasteful number, since it uses less digits than its factorization.

4148021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24150.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 4148021 is about 2036.6690943793. The cubic root of 4148021 is about 160.6745092579.

The spelling of 4148021 in words is "four million, one hundred forty-eight thousand, twenty-one".