65121975 has 30 divisors (see below), whose sum is σ = 120632160. Its totient is φ = 34730640.

The previous prime is 65121967. The next prime is 65121977. The reversal of 65121975 is 57912156.

It is not a de Polignac number, because 65121975 - 2³ = 65121967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65121977) 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 29 ways as a sum of consecutive naturals, for example, 14055 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (4021072).

Almost surely, 2^65121975 is an apocalyptic number.

65121975 is a deficient number, since it is larger than the sum of its proper divisors (55510185).

65121975 is a wasteful number, since it uses less digits than its factorization.

65121975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32181 (or 32167 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 65121975 is about 8069.8187711993. The cubic root of 65121975 is about 402.3239202562.

The spelling of 65121975 in words is "sixty-five million, one hundred twenty-one thousand, nine hundred seventy-five".