73001 has 4 divisors (see below), whose sum is σ = 75012. Its totient is φ = 70992.

The previous prime is 72997. The next prime is 73009. The reversal of 73001 is 10037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 30976 = 205^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 73001 - 2² = 72997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73009) 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, 950 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (18753).

2⁷³⁰⁰¹ is an apocalyptic number.

It is an amenable number.

73001 is a deficient number, since it is larger than the sum of its proper divisors (2011).

73001 is a wasteful number, since it uses less digits than its factorization.

73001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 21, while the sum is 11.

The square root of 73001 is about 270.1869722988. The cubic root of 73001 is about 41.7935828003.

Adding to 73001 its reverse (10037), we get a palindrome (83038).

The spelling of 73001 in words is "seventy-three thousand, one", and thus it is an iban number.