42465139 has 2 divisors, whose sum is σ = 42465140. Its totient is φ = 42465138.

The previous prime is 42465131. The next prime is 42465151. The reversal of 42465139 is 93156424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42465139 - 2³ = 42465131 is a prime.

It is not a weakly prime, because it can be changed into another prime (42465131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21232569 + 21232570.

It is an arithmetic number, because the mean of its divisors is an integer number (21232570).

Almost surely, 2^42465139 is an apocalyptic number.

42465139 is a deficient number, since it is larger than the sum of its proper divisors (1).

42465139 is an equidigital number, since it uses as much as digits as its factorization.

42465139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 42465139 is about 6516.5281400451. The cubic root of 42465139 is about 348.8811591989.

The spelling of 42465139 in words is "forty-two million, four hundred sixty-five thousand, one hundred thirty-nine".