123540535 has 4 divisors (see below), whose sum is σ = 148248648. Its totient is φ = 98832424.

The previous prime is 123540523. The next prime is 123540539. The reversal of 123540535 is 535045321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123540535 - 2⁷ = 123540407 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 (123540539) 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, 12354049 + ... + 12354058.

It is an arithmetic number, because the mean of its divisors is an integer number (37062162).

Almost surely, 2^123540535 is an apocalyptic number.

123540535 is a deficient number, since it is larger than the sum of its proper divisors (24708113).

123540535 is an equidigital number, since it uses as much as digits as its factorization.

123540535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24708112.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 123540535 is about 11114.8789916940. The cubic root of 123540535 is about 498.0464236868.

Adding to 123540535 its reverse (535045321), we get a palindrome (658585856).

The spelling of 123540535 in words is "one hundred twenty-three million, five hundred forty thousand, five hundred thirty-five".