52506421 has 16 divisors (see below), whose sum is σ = 61656768. Its totient is φ = 44179200.

The previous prime is 52506407. The next prime is 52506427. The reversal of 52506421 is 12460525.

52506421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 52506421 - 2¹¹ = 52504373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52506427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9106 + ... + 13708.

It is an arithmetic number, because the mean of its divisors is an integer number (3853548).

Almost surely, 2^52506421 is an apocalyptic number.

It is an amenable number.

52506421 is a deficient number, since it is larger than the sum of its proper divisors (9150347).

52506421 is a wasteful number, since it uses less digits than its factorization.

52506421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 52506421 is about 7246.1314506432. The cubic root of 52506421 is about 374.4588841512.

Adding to 52506421 its reverse (12460525), we get a palindrome (64966946).

The spelling of 52506421 in words is "fifty-two million, five hundred six thousand, four hundred twenty-one".