42546709 has 2 divisors, whose sum is σ = 42546710. Its totient is φ = 42546708.

The previous prime is 42546701. The next prime is 42546743. The reversal of 42546709 is 90764524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 17766225 = 4978^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 42546709 - 2³ = 42546701 is a prime.

It is equal to p_2578834 and since 42546709 and 2578834 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42546701) 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, 21273354 + 21273355.

It is an arithmetic number, because the mean of its divisors is an integer number (21273355).

Almost surely, 2^42546709 is an apocalyptic number.

It is an amenable number.

42546709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42546709 is an equidigital number, since it uses as much as digits as its factorization.

42546709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 42546709 is about 6522.7838382090. The cubic root of 42546709 is about 349.1044014059.

The spelling of 42546709 in words is "forty-two million, five hundred forty-six thousand, seven hundred nine".