4645021 has 4 divisors (see below), whose sum is σ = 4652092. Its totient is φ = 4637952.

The previous prime is 4645019. The next prime is 4645027. The reversal of 4645021 is 1205464.

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 3404025 + 1240996 = 1845^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645021 - 2¹ = 4645019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4644983 and 4645001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4645027) 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 3 ways as a sum of consecutive naturals, for example, 2436 + ... + 3901.

It is an arithmetic number, because the mean of its divisors is an integer number (1163023).

Almost surely, 2^4645021 is an apocalyptic number.

It is an amenable number.

4645021 is a deficient number, since it is larger than the sum of its proper divisors (7071).

4645021 is an equidigital number, since it uses as much as digits as its factorization.

4645021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 4645021 is about 2155.2310780981. The cubic root of 4645021 is about 166.8511588116.

The spelling of 4645021 in words is "four million, six hundred forty-five thousand, twenty-one".