4354021 has 12 divisors (see below), whose sum is σ = 5254752. Its totient is φ = 3533544.

The previous prime is 4354001. The next prime is 4354027. The reversal of 4354021 is 1204534.

It is not a de Polignac number, because 4354021 - 2¹⁷ = 4222949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4354021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4354027) 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 11 ways as a sum of consecutive naturals, for example, 1666 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (437896).

Almost surely, 2^4354021 is an apocalyptic number.

It is an amenable number.

4354021 is a deficient number, since it is larger than the sum of its proper divisors (900731).

4354021 is a wasteful number, since it uses less digits than its factorization.

4354021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4354021 is about 2086.6290997683. The cubic root of 4354021 is about 163.2914729137.

Adding to 4354021 its reverse (1204534), we get a palindrome (5558555).

It can be divided in two parts, 4 and 354021, that added together give a square (354025 = 595²).

The spelling of 4354021 in words is "four million, three hundred fifty-four thousand, twenty-one".