65534921 has 4 divisors (see below), whose sum is σ = 66051072. Its totient is φ = 65018772.

The previous prime is 65534897. The next prime is 65534929. The reversal of 65534921 is 12943556.

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 a de Polignac number, because none of the positive numbers 2^k-65534921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65534929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257885 + ... + 258138.

It is an arithmetic number, because the mean of its divisors is an integer number (16512768).

Almost surely, 2^65534921 is an apocalyptic number.

It is an amenable number.

65534921 is a deficient number, since it is larger than the sum of its proper divisors (516151).

65534921 is a wasteful number, since it uses less digits than its factorization.

65534921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516150.

The product of its digits is 32400, while the sum is 35.

The square root of 65534921 is about 8095.3641672256. The cubic root of 65534921 is about 403.1725232999.

The spelling of 65534921 in words is "sixty-five million, five hundred thirty-four thousand, nine hundred twenty-one".