42107609 has 2 divisors, whose sum is σ = 42107610. Its totient is φ = 42107608.

The previous prime is 42107587. The next prime is 42107647. The reversal of 42107609 is 90670124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 19829209 = 4720^2 + 4453^2 .

It is a cyclic number.

It is not a de Polignac number, because 42107609 - 2¹² = 42103513 is a prime.

It is not a weakly prime, because it can be changed into another prime (42107309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21053804 + 21053805.

It is an arithmetic number, because the mean of its divisors is an integer number (21053805).

Almost surely, 2^42107609 is an apocalyptic number.

It is an amenable number.

42107609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42107609 is an equidigital number, since it uses as much as digits as its factorization.

42107609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 42107609 is about 6489.0376019869. The cubic root of 42107609 is about 347.8992777824.

The spelling of 42107609 in words is "forty-two million, one hundred seven thousand, six hundred nine".