4557021 has 8 divisors (see below), whose sum is σ = 6944064. Its totient is φ = 2604000.

The previous prime is 4556999. The next prime is 4557041. The reversal of 4557021 is 1207554.

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

It is not a de Polignac number, because 4557021 - 2⁵ = 4556989 is a prime.

4557021 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 4556982 and 4557000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4557041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108480 + ... + 108521.

It is an arithmetic number, because the mean of its divisors is an integer number (868008).

Almost surely, 2^4557021 is an apocalyptic number.

It is an amenable number.

4557021 is a deficient number, since it is larger than the sum of its proper divisors (2387043).

4557021 is a wasteful number, since it uses less digits than its factorization.

4557021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217011.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 4557021 is about 2134.7180141649. The cubic root of 4557021 is about 165.7907679840.

The spelling of 4557021 in words is "four million, five hundred fifty-seven thousand, twenty-one".