65873121 has 4 divisors (see below), whose sum is σ = 87830832. Its totient is φ = 43915412.

The previous prime is 65873111. The next prime is 65873141. The reversal of 65873121 is 12137856.

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 65873121 - 2¹⁴ = 65856737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65873111) 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, 10978851 + ... + 10978856.

It is an arithmetic number, because the mean of its divisors is an integer number (21957708).

Almost surely, 2^65873121 is an apocalyptic number.

It is an amenable number.

65873121 is a deficient number, since it is larger than the sum of its proper divisors (21957711).

65873121 is a wasteful number, since it uses less digits than its factorization.

65873121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21957710.

The product of its digits is 10080, while the sum is 33.

The square root of 65873121 is about 8116.2257854251. The cubic root of 65873121 is about 403.8648720548.

The spelling of 65873121 in words is "sixty-five million, eight hundred seventy-three thousand, one hundred twenty-one".