42115009 has 2 divisors, whose sum is σ = 42115010. Its totient is φ = 42115008.

The previous prime is 42114977. The next prime is 42115027. The reversal of 42115009 is 90051124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 124609 = 6480^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 42115009 - 2⁵ = 42114977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42115049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057504 + 21057505.

It is an arithmetic number, because the mean of its divisors is an integer number (21057505).

Almost surely, 2^42115009 is an apocalyptic number.

It is an amenable number.

42115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115009 is an equidigital number, since it uses as much as digits as its factorization.

42115009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 42115009 is about 6489.6077693494. The cubic root of 42115009 is about 347.9196565526.

The spelling of 42115009 in words is "forty-two million, one hundred fifteen thousand, nine".