540852021 has 12 divisors (see below), whose sum is σ = 790009740. Its totient is φ = 356516160.

The previous prime is 540852019. The next prime is 540852041. The reversal of 540852021 is 120258045.

It is a happy number.

540852021 is a `hidden beast` number, since 540 + 85 + 20 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 185340996 + 355511025 = 13614^2 + 18855^2 .

It is not a de Polignac number, because 540852021 - 2¹ = 540852019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540852041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336810 + ... + 338411.

It is an arithmetic number, because the mean of its divisors is an integer number (65834145).

Almost surely, 2^540852021 is an apocalyptic number.

It is an amenable number.

540852021 is a deficient number, since it is larger than the sum of its proper divisors (249157719).

540852021 is a wasteful number, since it uses less digits than its factorization.

540852021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675316 (or 675313 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 540852021 is about 23256.2254246041. The cubic root of 540852021 is about 814.7533452594.

The spelling of 540852021 in words is "five hundred forty million, eight hundred fifty-two thousand, twenty-one".