52420891 has 4 divisors (see below), whose sum is σ = 53052552. Its totient is φ = 51789232.

The previous prime is 52420889. The next prime is 52420909. The reversal of 52420891 is 19802425.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52420891 - 2¹ = 52420889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52420811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315706 + ... + 315871.

It is an arithmetic number, because the mean of its divisors is an integer number (13263138).

Almost surely, 2^52420891 is an apocalyptic number.

52420891 is a deficient number, since it is larger than the sum of its proper divisors (631661).

52420891 is an equidigital number, since it uses as much as digits as its factorization.

52420891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631660.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 52420891 is about 7240.2272754383. The cubic root of 52420891 is about 374.2554495120.

The spelling of 52420891 in words is "fifty-two million, four hundred twenty thousand, eight hundred ninety-one".