540413721 has 8 divisors (see below), whose sum is σ = 800612960. Its totient is φ = 360275796.

The previous prime is 540413717. The next prime is 540413761. The reversal of 540413721 is 127314045.

It is not a de Polignac number, because 540413721 - 2² = 540413717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 20015323 = 540413721 / (5 + 4 + 0 + 4 + 1 + 3 + 7 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540413711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10007635 + ... + 10007688.

It is an arithmetic number, because the mean of its divisors is an integer number (100076620).

Almost surely, 2^540413721 is an apocalyptic number.

It is an amenable number.

540413721 is a deficient number, since it is larger than the sum of its proper divisors (260199239).

540413721 is a wasteful number, since it uses less digits than its factorization.

540413721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20015332 (or 20015326 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 540413721 is about 23246.8002314297. The cubic root of 540413721 is about 814.5331969959.

Adding to 540413721 its reverse (127314045), we get a palindrome (667727766).

The spelling of 540413721 in words is "five hundred forty million, four hundred thirteen thousand, seven hundred twenty-one".