73652121 has 6 divisors (see below), whose sum is σ = 106386410. Its totient is φ = 49101408.

The previous prime is 73652099. The next prime is 73652123. The reversal of 73652121 is 12125637.

It is a happy number.

73652121 is a `hidden beast` number, since 7 + 3 + 652 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 35721 = 8580^2 + 189^2 .

It is not a de Polignac number, because 73652121 - 2⁶ = 73652057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73652123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4091776 + ... + 4091793.

Almost surely, 2^73652121 is an apocalyptic number.

It is an amenable number.

73652121 is a deficient number, since it is larger than the sum of its proper divisors (32734289).

73652121 is a wasteful number, since it uses less digits than its factorization.

73652121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183575 (or 8183572 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 73652121 is about 8582.0813908981. The cubic root of 73652121 is about 419.1747229753.

Adding to 73652121 its reverse (12125637), we get a palindrome (85777758).

The spelling of 73652121 in words is "seventy-three million, six hundred fifty-two thousand, one hundred twenty-one".