4125432221 has 4 divisors (see below), whose sum is σ = 4126464252. Its totient is φ = 4124400192.

The previous prime is 4125432173. The next prime is 4125432239. The reversal of 4125432221 is 1222345214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222345214 = 2 ⋅611172607.

It can be written as a sum of positive squares in 2 ways, for example, as 2661528100 + 1463904121 = 51590^2 + 38261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4125432221 - 2¹⁰ = 4125431197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4125432271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509996 + ... + 518021.

It is an arithmetic number, because the mean of its divisors is an integer number (1031616063).

Almost surely, 2^4125432221 is an apocalyptic number.

It is an amenable number.

4125432221 is a deficient number, since it is larger than the sum of its proper divisors (1032031).

4125432221 is a wasteful number, since it uses less digits than its factorization.

4125432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032030.

The product of its digits is 3840, while the sum is 26.

The square root of 4125432221 is about 64229.5276411091. The cubic root of 4125432221 is about 1603.8231777364.

Adding to 4125432221 its reverse (1222345214), we get a palindrome (5347777435).

The spelling of 4125432221 in words is "four billion, one hundred twenty-five million, four hundred thirty-two thousand, two hundred twenty-one".