65573121 has 8 divisors (see below), whose sum is σ = 87526944. Its totient is φ = 43667360.

The previous prime is 65573117. The next prime is 65573141. The reversal of 65573121 is 12137556.

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 65573121 - 2² = 65573117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65573141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8700 + ... + 14381.

It is an arithmetic number, because the mean of its divisors is an integer number (10940868).

Almost surely, 2^65573121 is an apocalyptic number.

It is an amenable number.

65573121 is a deficient number, since it is larger than the sum of its proper divisors (21953823).

65573121 is a wasteful number, since it uses less digits than its factorization.

65573121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24031.

The product of its digits is 6300, while the sum is 30.

The square root of 65573121 is about 8097.7231985293. The cubic root of 65573121 is about 403.2508438792.

The spelling of 65573121 in words is "sixty-five million, five hundred seventy-three thousand, one hundred twenty-one".