65122139 has 8 divisors (see below), whose sum is σ = 70914000. Its totient is φ = 59566752.

The previous prime is 65122129. The next prime is 65122147. The reversal of 65122139 is 93122156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65122139 - 2²⁰ = 64073563 is a prime.

It is a super-3 number, since 3×65122139³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65122129) 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 in 7 ways as a sum of consecutive naturals, for example, 58544 + ... + 59645.

It is an arithmetic number, because the mean of its divisors is an integer number (8864250).

Almost surely, 2^65122139 is an apocalyptic number.

65122139 is a deficient number, since it is larger than the sum of its proper divisors (5791861).

65122139 is a wasteful number, since it uses less digits than its factorization.

65122139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118237.

The product of its digits is 3240, while the sum is 29.

The square root of 65122139 is about 8069.8289325115. The cubic root of 65122139 is about 402.3242579869.

The spelling of 65122139 in words is "sixty-five million, one hundred twenty-two thousand, one hundred thirty-nine".