42124609 has 2 divisors, whose sum is σ = 42124610. Its totient is φ = 42124608.

The previous prime is 42124603. The next prime is 42124619. The reversal of 42124609 is 90642124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41216400 + 908209 = 6420^2 + 953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42124609 is a prime.

It is not a weakly prime, because it can be changed into another prime (42124603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062304 + 21062305.

It is an arithmetic number, because the mean of its divisors is an integer number (21062305).

Almost surely, 2^42124609 is an apocalyptic number.

It is an amenable number.

42124609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124609 is an equidigital number, since it uses as much as digits as its factorization.

42124609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 42124609 is about 6490.3473712892. The cubic root of 42124609 is about 347.9460903191.

The spelling of 42124609 in words is "forty-two million, one hundred twenty-four thousand, six hundred nine".