540015421 has 32 divisors (see below), whose sum is σ = 641053440. Its totient is φ = 449433600.

The previous prime is 540015419. The next prime is 540015433. The reversal of 540015421 is 124510045.

It is not a de Polignac number, because 540015421 - 2¹ = 540015419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540015392 and 540015401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540015401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1181425 + ... + 1181881.

It is an arithmetic number, because the mean of its divisors is an integer number (20032920).

Almost surely, 2^540015421 is an apocalyptic number.

It is an amenable number.

540015421 is a deficient number, since it is larger than the sum of its proper divisors (101038019).

540015421 is a wasteful number, since it uses less digits than its factorization.

540015421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 540015421 is about 23238.2318819655. The cubic root of 540015421 is about 814.3330365777. Note that the first 3 decimals are identical.

Adding to 540015421 its reverse (124510045), we get a palindrome (664525466).

The spelling of 540015421 in words is "five hundred forty million, fifteen thousand, four hundred twenty-one".