540123601 has 4 divisors (see below), whose sum is σ = 540460900. Its totient is φ = 539786304.

The previous prime is 540123593. The next prime is 540123607. The reversal of 540123601 is 106321045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106321045 = 5 ⋅21264209.

It can be written as a sum of positive squares in 2 ways, for example, as 337089600 + 203034001 = 18360^2 + 14249^2 .

It is a cyclic number.

It is not a de Polignac number, because 540123601 - 2³ = 540123593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540123607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166236 + ... + 169453.

It is an arithmetic number, because the mean of its divisors is an integer number (135115225).

Almost surely, 2^540123601 is an apocalyptic number.

It is an amenable number.

540123601 is a deficient number, since it is larger than the sum of its proper divisors (337299).

540123601 is a wasteful number, since it uses less digits than its factorization.

540123601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337298.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 540123601 is about 23240.5593951609. The cubic root of 540123601 is about 814.3874107446.

Adding to 540123601 its reverse (106321045), we get a palindrome (646444646).

The spelling of 540123601 in words is "five hundred forty million, one hundred twenty-three thousand, six hundred one".