52405420 has 24 divisors (see below), whose sum is σ = 115844400. Its totient is φ = 19858752.

The previous prime is 52405403. The next prime is 52405427. The reversal of 52405420 is 2450425.

It is a junction number, because it is equal to n+sod(n) for n = 52405391 and 52405400.

It is not an unprimeable number, because it can be changed into a prime (52405427) 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, 68575 + ... + 69334.

It is an arithmetic number, because the mean of its divisors is an integer number (4826850).

Almost surely, 2^52405420 is an apocalyptic number.

It is an amenable number.

52405420 is an abundant number, since it is smaller than the sum of its proper divisors (63438980).

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

52405420 is a wasteful number, since it uses less digits than its factorization.

52405420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137937 (or 137935 counting only the distinct ones).

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

The square root of 52405420 is about 7239.1587909093. The cubic root of 52405420 is about 374.2186278324.

Adding to 52405420 its reverse (2450425), we get a palindrome (54855845).

It can be divided in two parts, 52405 and 420, that added together give a palindrome (52825).

The spelling of 52405420 in words is "fifty-two million, four hundred five thousand, four hundred twenty".