4650021 has 8 divisors (see below), whose sum is σ = 6888960. Its totient is φ = 3099996.

The previous prime is 4650017. The next prime is 4650029. The reversal of 4650021 is 1200564.

It is a happy number.

It is not a de Polignac number, because 4650021 - 2² = 4650017 is a prime.

It is a Curzon number.

4650021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4649976 and 4650003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4650029) 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, 86085 + ... + 86138.

It is an arithmetic number, because the mean of its divisors is an integer number (861120).

Almost surely, 2^4650021 is an apocalyptic number.

It is an amenable number.

4650021 is a deficient number, since it is larger than the sum of its proper divisors (2238939).

4650021 is a wasteful number, since it uses less digits than its factorization.

4650021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172232 (or 172226 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4650021 is about 2156.3907345377. The cubic root of 4650021 is about 166.9110047295.

Adding to 4650021 its reverse (1200564), we get a palindrome (5850585).

The spelling of 4650021 in words is "four million, six hundred fifty thousand, twenty-one".