4152021 has 8 divisors (see below), whose sum is σ = 5612160. Its totient is φ = 2729952.

The previous prime is 4152019. The next prime is 4152061. The reversal of 4152021 is 1202514.

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

It is not a de Polignac number, because 4152021 - 2¹ = 4152019 is a prime.

4152021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4152061) 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, 9261 + ... + 9698.

It is an arithmetic number, because the mean of its divisors is an integer number (701520).

Almost surely, 2^4152021 is an apocalyptic number.

It is an amenable number.

4152021 is a deficient number, since it is larger than the sum of its proper divisors (1460139).

4152021 is a wasteful number, since it uses less digits than its factorization.

4152021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19035.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 4152021 is about 2037.6508533112. The cubic root of 4152021 is about 160.7261396265.

Adding to 4152021 its reverse (1202514), we get a palindrome (5354535).

The spelling of 4152021 in words is "four million, one hundred fifty-two thousand, twenty-one".