4645262021 has 4 divisors (see below), whose sum is σ = 4805443500. Its totient is φ = 4485080544.

The previous prime is 4645261997. The next prime is 4645262059. The reversal of 4645262021 is 1202625464.

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 2856902500 + 1788359521 = 53450^2 + 42289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4645262021 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 (4645262621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80090696 + ... + 80090753.

It is an arithmetic number, because the mean of its divisors is an integer number (1201360875).

Almost surely, 2^4645262021 is an apocalyptic number.

It is an amenable number.

4645262021 is a deficient number, since it is larger than the sum of its proper divisors (160181479).

4645262021 is a wasteful number, since it uses less digits than its factorization.

4645262021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160181478.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 4645262021 is about 68156.1590833873. The cubic root of 4645262021 is about 1668.5404462118.

Adding to 4645262021 its reverse (1202625464), we get a palindrome (5847887485).

The spelling of 4645262021 in words is "four billion, six hundred forty-five million, two hundred sixty-two thousand, twenty-one".