4052722921 has 27 divisors (see below), whose sum is σ = 4518524919. Its totient is φ = 3633260592.

The previous prime is 4052722901. The next prime is 4052722951. The reversal of 4052722921 is 1292272504.

It is a happy number.

The square root of 4052722921 is 63661.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 599515225 + 3453207696 = 24485^2 + 58764^2 .

It is not a de Polignac number, because 4052722921 - 2⁹ = 4052722409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4052722901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48827946 + ... + 48828028.

Almost surely, 2^4052722921 is an apocalyptic number.

4052722921 is the 63661-st square number.

4052722921 is the 31831-st centered octagonal number.

It is an amenable number.

4052722921 is a deficient number, since it is larger than the sum of its proper divisors (465801998).

4052722921 is an frugal number, since it uses more digits than its factorization.

4052722921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The cubic root of 4052722921 is about 1594.3450003306.

The spelling of 4052722921 in words is "four billion, fifty-two million, seven hundred twenty-two thousand, nine hundred twenty-one".