65142139 has 2 divisors, whose sum is σ = 65142140. Its totient is φ = 65142138.

The previous prime is 65142137. The next prime is 65142169. The reversal of 65142139 is 93124156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65142139 - 2¹ = 65142137 is a prime.

Together with 65142137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65142139.

It is not a weakly prime, because it can be changed into another prime (65142131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32571069 + 32571070.

It is an arithmetic number, because the mean of its divisors is an integer number (32571070).

Almost surely, 2^65142139 is an apocalyptic number.

65142139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65142139 is an equidigital number, since it uses as much as digits as its factorization.

65142139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 65142139 is about 8071.0680210242. The cubic root of 65142139 is about 402.3654404055.

The spelling of 65142139 in words is "sixty-five million, one hundred forty-two thousand, one hundred thirty-nine".