42921341 has 2 divisors, whose sum is σ = 42921342. Its totient is φ = 42921340.

The previous prime is 42921287. The next prime is 42921343. The reversal of 42921341 is 14312924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38800441 + 4120900 = 6229^2 + 2030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42921341 is a prime.

Together with 42921343, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42921341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42921343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21460670 + 21460671.

It is an arithmetic number, because the mean of its divisors is an integer number (21460671).

Almost surely, 2^42921341 is an apocalyptic number.

It is an amenable number.

42921341 is a deficient number, since it is larger than the sum of its proper divisors (1).

42921341 is an equidigital number, since it uses as much as digits as its factorization.

42921341 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42921341 is about 6551.4380864052. The cubic root of 42921341 is about 350.1260525559.

The spelling of 42921341 in words is "forty-two million, nine hundred twenty-one thousand, three hundred forty-one".