73517121 has 12 divisors (see below), whose sum is σ = 107167060. Its totient is φ = 48561120.

The previous prime is 73517111. The next prime is 73517149. The reversal of 73517121 is 12171537.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30470400 + 43046721 = 5520^2 + 6561^2 .

It is not a de Polignac number, because 73517121 - 2²¹ = 71419969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73517111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36490 + ... + 38451.

Almost surely, 2^73517121 is an apocalyptic number.

It is an amenable number.

73517121 is a deficient number, since it is larger than the sum of its proper divisors (33649939).

73517121 is a wasteful number, since it uses less digits than its factorization.

73517121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75056 (or 75053 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 73517121 is about 8574.2125585969. The cubic root of 73517121 is about 418.9184588126.

Adding to 73517121 its reverse (12171537), we get a palindrome (85688658).

The spelling of 73517121 in words is "seventy-three million, five hundred seventeen thousand, one hundred twenty-one".