540021252 has 24 divisors (see below), whose sum is σ = 1334170656. Its totient is φ = 169418368.

The previous prime is 540021241. The next prime is 540021259. The reversal of 540021252 is 252120045.

It is a happy number.

It is a super-2 number, since 2×540021252² = 583245905223295008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (540021259) 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, 1323378 + ... + 1323785.

It is an arithmetic number, because the mean of its divisors is an integer number (55590444).

Almost surely, 2^540021252 is an apocalyptic number.

It is an amenable number.

540021252 is an abundant number, since it is smaller than the sum of its proper divisors (794149404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

540021252 is a wasteful number, since it uses less digits than its factorization.

540021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647187 (or 2647185 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 540021252 is about 23238.3573429793. The cubic root of 540021252 is about 814.3359675797.

Adding to 540021252 its reverse (252120045), we get a palindrome (792141297).

The spelling of 540021252 in words is "five hundred forty million, twenty-one thousand, two hundred fifty-two".