42960221 has 2 divisors, whose sum is σ = 42960222. Its totient is φ = 42960220.

The previous prime is 42960191. The next prime is 42960259. The reversal of 42960221 is 12206924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29920900 + 13039321 = 5470^2 + 3611^2 .

It is a cyclic number.

It is not a de Polignac number, because 42960221 - 2¹⁰ = 42959197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42960521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21480110 + 21480111.

It is an arithmetic number, because the mean of its divisors is an integer number (21480111).

Almost surely, 2^42960221 is an apocalyptic number.

It is an amenable number.

42960221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42960221 is an equidigital number, since it uses as much as digits as its factorization.

42960221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42960221 is about 6554.4047021831. The cubic root of 42960221 is about 350.2317404048.

The spelling of 42960221 in words is "forty-two million, nine hundred sixty thousand, two hundred twenty-one".