52501421 has 4 divisors (see below), whose sum is σ = 60001632. Its totient is φ = 45001212.

The previous prime is 52501417. The next prime is 52501451. The reversal of 52501421 is 12410525.

52501421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 52501421 - 2² = 52501417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52501393 and 52501402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52501411) by changing a digit.

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, 3750095 + ... + 3750108.

It is an arithmetic number, because the mean of its divisors is an integer number (15000408).

Almost surely, 2^52501421 is an apocalyptic number.

It is an amenable number.

52501421 is a deficient number, since it is larger than the sum of its proper divisors (7500211).

52501421 is an equidigital number, since it uses as much as digits as its factorization.

52501421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500210.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 52501421 is about 7245.7864307472. The cubic root of 52501421 is about 374.4469976440.

Adding to 52501421 its reverse (12410525), we get a palindrome (64911946).

The spelling of 52501421 in words is "fifty-two million, five hundred one thousand, four hundred twenty-one".