4272417021 has 4 divisors (see below), whose sum is σ = 5696556032. Its totient is φ = 2848278012.

The previous prime is 4272416987. The next prime is 4272417043. The reversal of 4272417021 is 1207142724.

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 not a de Polignac number, because 4272417021 - 2¹⁰ = 4272415997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4272417021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4272217021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712069501 + ... + 712069506.

It is an arithmetic number, because the mean of its divisors is an integer number (1424139008).

Almost surely, 2^4272417021 is an apocalyptic number.

It is an amenable number.

4272417021 is a deficient number, since it is larger than the sum of its proper divisors (1424139011).

4272417021 is a wasteful number, since it uses less digits than its factorization.

4272417021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424139010.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 4272417021 is about 65363.7286344652. The cubic root of 4272417021 is about 1622.6488470705.

Adding to 4272417021 its reverse (1207142724), we get a palindrome (5479559745).

The spelling of 4272417021 in words is "four billion, two hundred seventy-two million, four hundred seventeen thousand, twenty-one".