65010921 has 4 divisors (see below), whose sum is σ = 86681232. Its totient is φ = 43340612.

The previous prime is 65010877. The next prime is 65010931. The reversal of 65010921 is 12901056.

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 65010921 - 2⁹ = 65010409 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 65010891 and 65010900.

It is not an unprimeable number, because it can be changed into a prime (65010931) 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, 10835151 + ... + 10835156.

It is an arithmetic number, because the mean of its divisors is an integer number (21670308).

Almost surely, 2^65010921 is an apocalyptic number.

It is an amenable number.

65010921 is a deficient number, since it is larger than the sum of its proper divisors (21670311).

65010921 is a wasteful number, since it uses less digits than its factorization.

65010921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21670310.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 65010921 is about 8062.9350115203. The cubic root of 65010921 is about 402.0950927241.

Adding to 65010921 its reverse (12901056), we get a palindrome (77911977).

The spelling of 65010921 in words is "sixty-five million, ten thousand, nine hundred twenty-one".