4232142721 has 2 divisors, whose sum is σ = 4232142722. Its totient is φ = 4232142720.

The previous prime is 4232142701. The next prime is 4232142737. The reversal of 4232142721 is 1272412324.

4232142721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2969051121 + 1263091600 = 54489^2 + 35540^2 .

It is a cyclic number.

It is not a de Polignac number, because 4232142721 - 2¹⁵ = 4232109953 is a prime.

It is a super-2 number, since 2×4232142721² = 35822064021826567682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4232142721.

It is not a weakly prime, because it can be changed into another prime (4232142701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2116071360 + 2116071361.

It is an arithmetic number, because the mean of its divisors is an integer number (2116071361).

Almost surely, 2^4232142721 is an apocalyptic number.

It is an amenable number.

4232142721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4232142721 is an equidigital number, since it uses as much as digits as its factorization.

4232142721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 4232142721 is about 65054.9208054241. The cubic root of 4232142721 is about 1617.5340627803.

The spelling of 4232142721 in words is "four billion, two hundred thirty-two million, one hundred forty-two thousand, seven hundred twenty-one".