43242420123 has 24 divisors (see below), whose sum is σ = 71822270208. Its totient is φ = 24558353712.

The previous prime is 43242420103. The next prime is 43242420157. The reversal of 43242420123 is 32102424234.

43242420123 is a `hidden beast` number, since 4 + 32 + 424 + 201 + 2 + 3 = 666.

It is not a de Polignac number, because 43242420123 - 2¹⁴ = 43242403739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43242420103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2095215 + ... + 2115752.

It is an arithmetic number, because the mean of its divisors is an integer number (2992594592).

Almost surely, 2^43242420123 is an apocalyptic number.

43242420123 is a deficient number, since it is larger than the sum of its proper divisors (28579850085).

43242420123 is a wasteful number, since it uses less digits than its factorization.

43242420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211143 (or 4211140 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 43242420123 its reverse (32102424234), we get a palindrome (75344844357).

The spelling of 43242420123 in words is "forty-three billion, two hundred forty-two million, four hundred twenty thousand, one hundred twenty-three".