6540123 has 16 divisors (see below), whose sum is σ = 9244800. Its totient is φ = 4101120.

The previous prime is 6540103. The next prime is 6540133. The reversal of 6540123 is 3210456.

It is a happy number.

It is not a de Polignac number, because 6540123 - 2⁸ = 6539867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6540123.

It is not an unprimeable number, because it can be changed into a prime (6540103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9883 + ... + 10523.

It is an arithmetic number, because the mean of its divisors is an integer number (577800).

Almost surely, 2^6540123 is an apocalyptic number.

6540123 is a deficient number, since it is larger than the sum of its proper divisors (2704677).

6540123 is a wasteful number, since it uses less digits than its factorization.

6540123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6540123 is about 2557.3664187988. The cubic root of 6540123 is about 187.0087692609.

Adding to 6540123 its reverse (3210456), we get a palindrome (9750579).

The spelling of 6540123 in words is "six million, five hundred forty thousand, one hundred twenty-three".