65537121 has 8 divisors (see below), whose sum is σ = 94104640. Its totient is φ = 40330512.

The previous prime is 65537113. The next prime is 65537161. The reversal of 65537121 is 12173556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65537121 - 2³ = 65537113 is a prime.

It is a super-2 number, since 2×65537121² = 8590228457937282, which contains 22 as substring.

It is the 8096-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65537161) by changing a digit.

It is a nontrivial repunit in base 8095.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840181 + ... + 840258.

It is an arithmetic number, because the mean of its divisors is an integer number (11763080).

Almost surely, 2^65537121 is an apocalyptic number.

It is an amenable number.

65537121 is a deficient number, since it is larger than the sum of its proper divisors (28567519).

65537121 is a wasteful number, since it uses less digits than its factorization.

65537121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680455.

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

The square root of 65537121 is about 8095.5000463220. The cubic root of 65537121 is about 403.1770347350.

The spelling of 65537121 in words is "sixty-five million, five hundred thirty-seven thousand, one hundred twenty-one".