4664021 has 4 divisors (see below), whose sum is σ = 4679052. Its totient is φ = 4648992.

The previous prime is 4664017. The next prime is 4664057. The reversal of 4664021 is 1204664.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 3010225 = 1286^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 4664021 - 2² = 4664017 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 (4664221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7040 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (1169763).

Almost surely, 2^4664021 is an apocalyptic number.

It is an amenable number.

4664021 is a deficient number, since it is larger than the sum of its proper divisors (15031).

4664021 is a wasteful number, since it uses less digits than its factorization.

4664021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15030.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4664021 is about 2159.6344598103. The cubic root of 4664021 is about 167.0783453976.

Adding to 4664021 its reverse (1204664), we get a palindrome (5868685).

The spelling of 4664021 in words is "four million, six hundred sixty-four thousand, twenty-one".