42386213 has 4 divisors (see below), whose sum is σ = 42449868. Its totient is φ = 42322560.

The previous prime is 42386189. The next prime is 42386233. The reversal of 42386213 is 31268324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22118209 + 20268004 = 4703^2 + 4502^2 .

It is a cyclic number.

It is not a de Polignac number, because 42386213 - 2¹² = 42382117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42386233) 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 in 3 ways as a sum of consecutive naturals, for example, 30818 + ... + 32163.

It is an arithmetic number, because the mean of its divisors is an integer number (10612467).

Almost surely, 2^42386213 is an apocalyptic number.

It is an amenable number.

42386213 is a deficient number, since it is larger than the sum of its proper divisors (63655).

42386213 is an equidigital number, since it uses as much as digits as its factorization.

42386213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63654.

The product of its digits is 6912, while the sum is 29.

The square root of 42386213 is about 6510.4694915190. The cubic root of 42386213 is about 348.6648808424.

The spelling of 42386213 in words is "forty-two million, three hundred eighty-six thousand, two hundred thirteen".