52667421 has 4 divisors (see below), whose sum is σ = 70223232. Its totient is φ = 35111612.

The previous prime is 52667387. The next prime is 52667423. The reversal of 52667421 is 12476625.

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 52667421 - 2¹⁵ = 52634653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52667423) 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, 8777901 + ... + 8777906.

It is an arithmetic number, because the mean of its divisors is an integer number (17555808).

Almost surely, 2^52667421 is an apocalyptic number.

It is an amenable number.

52667421 is a deficient number, since it is larger than the sum of its proper divisors (17555811).

52667421 is a wasteful number, since it uses less digits than its factorization.

52667421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17555810.

The product of its digits is 20160, while the sum is 33.

The square root of 52667421 is about 7257.2323236892. The cubic root of 52667421 is about 374.8412270081.

The spelling of 52667421 in words is "fifty-two million, six hundred sixty-seven thousand, four hundred twenty-one".