540972021 has 8 divisors (see below), whose sum is σ = 736642944. Its totient is φ = 352974560.

The previous prime is 540971989. The next prime is 540972023. The reversal of 540972021 is 120279045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540972021 - 2⁵ = 540971989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 540972021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540972023) 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, 1918200 + ... + 1918481.

It is an arithmetic number, because the mean of its divisors is an integer number (92080368).

Almost surely, 2^540972021 is an apocalyptic number.

It is an amenable number.

540972021 is a deficient number, since it is larger than the sum of its proper divisors (195670923).

540972021 is a wasteful number, since it uses less digits than its factorization.

540972021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836731.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 540972021 is about 23258.8052358671. The cubic root of 540972021 is about 814.8135978286.

The spelling of 540972021 in words is "five hundred forty million, nine hundred seventy-two thousand, twenty-one".