52405442 has 8 divisors (see below), whose sum is σ = 78689100. Its totient is φ = 26175744.

The previous prime is 52405429. The next prime is 52405471. The reversal of 52405442 is 24450425.

52405442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 48288601 + 4116841 = 6949^2 + 2029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10967 + ... + 15002.

Almost surely, 2^52405442 is an apocalyptic number.

52405442 is a deficient number, since it is larger than the sum of its proper divisors (26283658).

52405442 is a wasteful number, since it uses less digits than its factorization.

52405442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26980.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 52405442 is about 7239.1603104227. The cubic root of 52405442 is about 374.2186801985.

Adding to 52405442 its reverse (24450425), we get a palindrome (76855867).

The spelling of 52405442 in words is "fifty-two million, four hundred five thousand, four hundred forty-two".