4720253721 has 4 divisors (see below), whose sum is σ = 6293671632. Its totient is φ = 3146835812.

The previous prime is 4720253717. The next prime is 4720253753. The reversal of 4720253721 is 1273520274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4720253721 - 2² = 4720253717 is a prime.

It is a super-2 number, since 2×4720253721² = 44561590381228691682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4720253761) 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, 786708951 + ... + 786708956.

It is an arithmetic number, because the mean of its divisors is an integer number (1573417908).

Almost surely, 2^4720253721 is an apocalyptic number.

It is an amenable number.

4720253721 is a deficient number, since it is larger than the sum of its proper divisors (1573417911).

4720253721 is a wasteful number, since it uses less digits than its factorization.

4720253721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573417910.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 4720253721 is about 68704.1026504240. The cubic root of 4720253721 is about 1677.4713614113.

Adding to 4720253721 its reverse (1273520274), we get a palindrome (5993773995).

The spelling of 4720253721 in words is "four billion, seven hundred twenty million, two hundred fifty-three thousand, seven hundred twenty-one".