52507420 has 72 divisors (see below), whose sum is σ = 129563280. Its totient is φ = 17821440.

The previous prime is 52507417. The next prime is 52507489. The reversal of 52507420 is 2470525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128176 + ... + 128584.

It is an arithmetic number, because the mean of its divisors is an integer number (1799490).

Almost surely, 2^52507420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52507420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64781640).

52507420 is an abundant number, since it is smaller than the sum of its proper divisors (77055860).

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

52507420 is a wasteful number, since it uses less digits than its factorization.

52507420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 52507420 is about 7246.2003836494. The cubic root of 52507420 is about 374.4612589849.

Adding to 52507420 its reverse (2470525), we get a palindrome (54977945).

The spelling of 52507420 in words is "fifty-two million, five hundred seven thousand, four hundred twenty".