42735139 has 2 divisors, whose sum is σ = 42735140. Its totient is φ = 42735138.

The previous prime is 42735107. The next prime is 42735157. The reversal of 42735139 is 93153724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42735139 - 2⁵ = 42735107 is a prime.

It is not a weakly prime, because it can be changed into another prime (42735169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21367569 + 21367570.

It is an arithmetic number, because the mean of its divisors is an integer number (21367570).

Almost surely, 2^42735139 is an apocalyptic number.

42735139 is a deficient number, since it is larger than the sum of its proper divisors (1).

42735139 is an equidigital number, since it uses as much as digits as its factorization.

42735139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 42735139 is about 6537.2118674554. The cubic root of 42735139 is about 349.6190112797.

The spelling of 42735139 in words is "forty-two million, seven hundred thirty-five thousand, one hundred thirty-nine".