42256693 has 2 divisors, whose sum is σ = 42256694. Its totient is φ = 42256692.

The previous prime is 42256667. The next prime is 42256729. The reversal of 42256693 is 39665224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 15816529 = 5142^2 + 3977^2 .

It is a cyclic number.

It is not a de Polignac number, because 42256693 - 2⁵ = 42256661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42256633) 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, 21128346 + 21128347.

It is an arithmetic number, because the mean of its divisors is an integer number (21128347).

Almost surely, 2^42256693 is an apocalyptic number.

It is an amenable number.

42256693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42256693 is an equidigital number, since it uses as much as digits as its factorization.

42256693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 42256693 is about 6500.5148257657. The cubic root of 42256693 is about 348.3093788360.

The spelling of 42256693 in words is "forty-two million, two hundred fifty-six thousand, six hundred ninety-three".