42705349 has 2 divisors, whose sum is σ = 42705350. Its totient is φ = 42705348.

The previous prime is 42705347. The next prime is 42705353. The reversal of 42705349 is 94350724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23213124 + 19492225 = 4818^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 42705349 - 2¹ = 42705347 is a prime.

Together with 42705347, 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 (42705347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21352674 + 21352675.

It is an arithmetic number, because the mean of its divisors is an integer number (21352675).

Almost surely, 2^42705349 is an apocalyptic number.

It is an amenable number.

42705349 is a deficient number, since it is larger than the sum of its proper divisors (1).

42705349 is an equidigital number, since it uses as much as digits as its factorization.

42705349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 42705349 is about 6534.9329759379. The cubic root of 42705349 is about 349.5377544061.

The spelling of 42705349 in words is "forty-two million, seven hundred five thousand, three hundred forty-nine".