4356021 has 8 divisors (see below), whose sum is σ = 5827840. Its totient is φ = 2894112.

The previous prime is 4356013. The next prime is 4356041. The reversal of 4356021 is 1206534.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4356021 - 2³ = 4356013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4356041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 3258.

It is an arithmetic number, because the mean of its divisors is an integer number (728480).

Almost surely, 2^4356021 is an apocalyptic number.

It is an amenable number.

4356021 is a deficient number, since it is larger than the sum of its proper divisors (1471819).

4356021 is a wasteful number, since it uses less digits than its factorization.

4356021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4955.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 4356021 is about 2087.1082866013. The cubic root of 4356021 is about 163.3164714881.

The spelling of 4356021 in words is "four million, three hundred fifty-six thousand, twenty-one".