4200465721 has 3 divisors (see below), whose sum is σ = 4200530533. Its totient is φ = 4200400910.

The previous prime is 4200465713. The next prime is 4200465727. The reversal of 4200465721 is 1275640024.

The square root of 4200465721 is 64811.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4200465721 - 2³ = 4200465713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4200465727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 32406 + ... + 97216.

Almost surely, 2^4200465721 is an apocalyptic number.

4200465721 is the 64811-st square number.

4200465721 is the 32406-th centered octagonal number.

It is an amenable number.

4200465721 is a deficient number, since it is larger than the sum of its proper divisors (64812).

4200465721 is an frugal number, since it uses more digits than its factorization.

4200465721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129622 (or 64811 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The cubic root of 4200465721 is about 1613.4882793444.

The spelling of 4200465721 in words is "four billion, two hundred million, four hundred sixty-five thousand, seven hundred twenty-one".