73201021 has 8 divisors (see below), whose sum is σ = 74071800. Its totient is φ = 72334080.

The previous prime is 73201001. The next prime is 73201027. The reversal of 73201021 is 12010237.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20115225 + 53085796 = 4485^2 + 7286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73201021 - 2⁵ = 73200989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73200986 and 73201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73201027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56145 + ... + 57433.

It is an arithmetic number, because the mean of its divisors is an integer number (9258975).

Almost surely, 2^73201021 is an apocalyptic number.

It is an amenable number.

73201021 is a deficient number, since it is larger than the sum of its proper divisors (870779).

73201021 is a wasteful number, since it uses less digits than its factorization.

73201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 73201021 is about 8555.7595220997. The cubic root of 73201021 is about 418.3171913088.

Adding to 73201021 its reverse (12010237), we get a palindrome (85211258).

The spelling of 73201021 in words is "seventy-three million, two hundred one thousand, twenty-one".