52420540 has 12 divisors (see below), whose sum is σ = 110083176. Its totient is φ = 20968208.

The previous prime is 52420493. The next prime is 52420541. The reversal of 52420540 is 4502425.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52420541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310494 + ... + 1310533.

It is an arithmetic number, because the mean of its divisors is an integer number (9173598).

Almost surely, 2^52420540 is an apocalyptic number.

It is an amenable number.

52420540 is an abundant number, since it is smaller than the sum of its proper divisors (57662636).

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

52420540 is a wasteful number, since it uses less digits than its factorization.

52420540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621036 (or 2621034 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 52420540 is about 7240.2030358271. The cubic root of 52420540 is about 374.2546141965.

Adding to 52420540 its reverse (4502425), we get a palindrome (56922965).

The spelling of 52420540 in words is "fifty-two million, four hundred twenty thousand, five hundred forty".