52420861 has 4 divisors (see below), whose sum is σ = 52510752. Its totient is φ = 52330972.

The previous prime is 52420859. The next prime is 52420871. The reversal of 52420861 is 16802425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52420861 - 2¹ = 52420859 is a prime.

It is a super-5 number, since 5×52420861⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44065 + ... + 45238.

It is an arithmetic number, because the mean of its divisors is an integer number (13127688).

Almost surely, 2^52420861 is an apocalyptic number.

It is an amenable number.

52420861 is a deficient number, since it is larger than the sum of its proper divisors (89891).

52420861 is an equidigital number, since it uses as much as digits as its factorization.

52420861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89890.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 52420861 is about 7240.2252036798. The cubic root of 52420861 is about 374.2553781177.

The spelling of 52420861 in words is "fifty-two million, four hundred twenty thousand, eight hundred sixty-one".