4321540123 has 4 divisors (see below), whose sum is σ = 4322600568. Its totient is φ = 4320479680.

The previous prime is 4321540103. The next prime is 4321540169. The reversal of 4321540123 is 3210451234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210451234 = 2 ⋅1605225617.

It is a cyclic number.

It is not a de Polignac number, because 4321540123 - 2¹⁷ = 4321409051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4321540103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524086 + ... + 532267.

It is an arithmetic number, because the mean of its divisors is an integer number (1080650142).

Almost surely, 2^4321540123 is an apocalyptic number.

4321540123 is a deficient number, since it is larger than the sum of its proper divisors (1060445).

4321540123 is a wasteful number, since it uses less digits than its factorization.

4321540123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060444.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4321540123 is about 65738.4219691955. The cubic root of 4321540123 is about 1628.8440903412.

Adding to 4321540123 its reverse (3210451234), we get a palindrome (7531991357).

Subtracting from 4321540123 its reverse (3210451234), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 43215 and 40123, that added together give a palindrome (83338).

The spelling of 4321540123 in words is "four billion, three hundred twenty-one million, five hundred forty thousand, one hundred twenty-three".