42256733 has 2 divisors, whose sum is σ = 42256734. Its totient is φ = 42256732.

The previous prime is 42256729. The next prime is 42256769. The reversal of 42256733 is 33765224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37429924 + 4826809 = 6118^2 + 2197^2 .

It is a cyclic number.

It is not a de Polignac number, because 42256733 - 2² = 42256729 is a prime.

It is equal to p_2562287 and since 42256733 and 2562287 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42256733.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 21128366 + 21128367.

It is an arithmetic number, because the mean of its divisors is an integer number (21128367).

Almost surely, 2^42256733 is an apocalyptic number.

It is an amenable number.

42256733 is a deficient number, since it is larger than the sum of its proper divisors (1).

42256733 is an equidigital number, since it uses as much as digits as its factorization.

42256733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 32.

The square root of 42256733 is about 6500.5179024444. The cubic root of 42256733 is about 348.3094887386.

The spelling of 42256733 in words is "forty-two million, two hundred fifty-six thousand, seven hundred thirty-three".