52012421 has 4 divisors (see below), whose sum is σ = 52057644. Its totient is φ = 51967200.

The previous prime is 52012397. The next prime is 52012423. The reversal of 52012421 is 12421025.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39551521 + 12460900 = 6289^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 52012421 - 2¹⁸ = 51750277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52012423) 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, 20840 + ... + 23201.

It is an arithmetic number, because the mean of its divisors is an integer number (13014411).

Almost surely, 2^52012421 is an apocalyptic number.

It is an amenable number.

52012421 is a deficient number, since it is larger than the sum of its proper divisors (45223).

52012421 is a wasteful number, since it uses less digits than its factorization.

52012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45222.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 52012421 is about 7211.9637408961. The cubic root of 52012421 is about 373.2808322395.

Adding to 52012421 its reverse (12421025), we get a palindrome (64433446).

The spelling of 52012421 in words is "fifty-two million, twelve thousand, four hundred twenty-one".