73121200 has 30 divisors (see below), whose sum is σ = 175674644. Its totient is φ = 29248320.

The previous prime is 73121197. The next prime is 73121201. The reversal of 73121200 is 212137.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (73121201) 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, 91002 + ... + 91801.

Almost surely, 2^73121200 is an apocalyptic number.

It is an amenable number.

73121200 is an abundant number, since it is smaller than the sum of its proper divisors (102553444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73121200 is a wasteful number, since it uses less digits than its factorization.

73121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182821 (or 182810 counting only the distinct ones).

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

The square root of 73121200 is about 8551.0934973254. The cubic root of 73121200 is about 418.1650866881.

Adding to 73121200 its reverse (212137), we get a palindrome (73333337).

The spelling of 73121200 in words is "seventy-three million, one hundred twenty-one thousand, two hundred".