65164121 has 4 divisors (see below), whose sum is σ = 71088144. Its totient is φ = 59240100.

The previous prime is 65164103. The next prime is 65164157. The reversal of 65164121 is 12146156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65164121 - 2¹⁰ = 65163097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65164921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2961995 + ... + 2962016.

It is an arithmetic number, because the mean of its divisors is an integer number (17772036).

Almost surely, 2^65164121 is an apocalyptic number.

It is an amenable number.

65164121 is a deficient number, since it is larger than the sum of its proper divisors (5924023).

65164121 is a wasteful number, since it uses less digits than its factorization.

65164121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924022.

The product of its digits is 1440, while the sum is 26.

The square root of 65164121 is about 8072.4296838065. The cubic root of 65164121 is about 402.4106942793.

The spelling of 65164121 in words is "sixty-five million, one hundred sixty-four thousand, one hundred twenty-one".