73452161 has 4 divisors (see below), whose sum is σ = 73530672. Its totient is φ = 73373652.

The previous prime is 73452103. The next prime is 73452191. The reversal of 73452161 is 16125437.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16125437 = 347 ⋅46471.

It is a cyclic number.

It is not a de Polignac number, because 73452161 - 2⁶ = 73452097 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 (73452191) 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, 37835 + ... + 39728.

It is an arithmetic number, because the mean of its divisors is an integer number (18382668).

Almost surely, 2^73452161 is an apocalyptic number.

It is an amenable number.

73452161 is a deficient number, since it is larger than the sum of its proper divisors (78511).

73452161 is an equidigital number, since it uses as much as digits as its factorization.

73452161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78510.

The product of its digits is 5040, while the sum is 29.

The square root of 73452161 is about 8570.4236184683. The cubic root of 73452161 is about 418.7950364868.

Adding to 73452161 its reverse (16125437), we get a palindrome (89577598).

The spelling of 73452161 in words is "seventy-three million, four hundred fifty-two thousand, one hundred sixty-one".