52642921 has 2 divisors, whose sum is σ = 52642922. Its totient is φ = 52642920.

The previous prime is 52642913. The next prime is 52642943. The reversal of 52642921 is 12924625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 5569600 = 6861^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 52642921 - 2³ = 52642913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52642951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26321460 + 26321461.

It is an arithmetic number, because the mean of its divisors is an integer number (26321461).

Almost surely, 2^52642921 is an apocalyptic number.

It is an amenable number.

52642921 is a deficient number, since it is larger than the sum of its proper divisors (1).

52642921 is an equidigital number, since it uses as much as digits as its factorization.

52642921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 52642921 is about 7255.5441560230. The cubic root of 52642921 is about 374.7830947113.

The spelling of 52642921 in words is "fifty-two million, six hundred forty-two thousand, nine hundred twenty-one".