4125434721 has 16 divisors (see below), whose sum is σ = 5768889984. Its totient is φ = 2617349504.

The previous prime is 4125434713. The next prime is 4125434741. The reversal of 4125434721 is 1274345214.

It is a cyclic number.

It is not a de Polignac number, because 4125434721 - 2³ = 4125434713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (4125434741) 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 15 ways as a sum of consecutive naturals, for example, 138156 + ... + 165341.

It is an arithmetic number, because the mean of its divisors is an integer number (360555624).

Almost surely, 2^4125434721 is an apocalyptic number.

It is an amenable number.

4125434721 is a deficient number, since it is larger than the sum of its proper divisors (1643455263).

4125434721 is a wasteful number, since it uses less digits than its factorization.

4125434721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303720.

The product of its digits is 26880, while the sum is 33.

The square root of 4125434721 is about 64229.5471025602. The cubic root of 4125434721 is about 1603.8235017070.

Adding to 4125434721 its reverse (1274345214), we get a palindrome (5399779935).

The spelling of 4125434721 in words is "four billion, one hundred twenty-five million, four hundred thirty-four thousand, seven hundred twenty-one".