42385397 has 2 divisors, whose sum is σ = 42385398. Its totient is φ = 42385396.

The previous prime is 42385363. The next prime is 42385429. The reversal of 42385397 is 79358324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33570436 + 8814961 = 5794^2 + 2969^2 .

It is a cyclic number.

It is not a de Polignac number, because 42385397 - 2¹² = 42381301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42385307) 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, 21192698 + 21192699.

It is an arithmetic number, because the mean of its divisors is an integer number (21192699).

Almost surely, 2^42385397 is an apocalyptic number.

It is an amenable number.

42385397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42385397 is an equidigital number, since it uses as much as digits as its factorization.

42385397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 42385397 is about 6510.4068229259. The cubic root of 42385397 is about 348.6626433824.

The spelling of 42385397 in words is "forty-two million, three hundred eighty-five thousand, three hundred ninety-seven".