42342493 has 2 divisors, whose sum is σ = 42342494. Its totient is φ = 42342492.

The previous prime is 42342491. The next prime is 42342511. The reversal of 42342493 is 39424324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42341049 + 1444 = 6507^2 + 38^2 .

It is a cyclic number.

It is not a de Polignac number, because 42342493 - 2¹ = 42342491 is a prime.

Together with 42342491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42342491) 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, 21171246 + 21171247.

It is an arithmetic number, because the mean of its divisors is an integer number (21171247).

Almost surely, 2^42342493 is an apocalyptic number.

It is an amenable number.

42342493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342493 is an equidigital number, since it uses as much as digits as its factorization.

42342493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 31.

The square root of 42342493 is about 6507.1109564845. The cubic root of 42342493 is about 348.5449607739.

The spelling of 42342493 in words is "forty-two million, three hundred forty-two thousand, four hundred ninety-three".