42320737 has 2 divisors, whose sum is σ = 42320738. Its totient is φ = 42320736.

The previous prime is 42320699. The next prime is 42320749. The reversal of 42320737 is 73702324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 1245456 = 6409^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320737 - 2⁷ = 42320609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42320767) 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, 21160368 + 21160369.

It is an arithmetic number, because the mean of its divisors is an integer number (21160369).

Almost surely, 2^42320737 is an apocalyptic number.

It is an amenable number.

42320737 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320737 is an equidigital number, since it uses as much as digits as its factorization.

42320737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 42320737 is about 6505.4390320715. The cubic root of 42320737 is about 348.4852552415.

The spelling of 42320737 in words is "forty-two million, three hundred twenty thousand, seven hundred thirty-seven".