73107421 has 8 divisors (see below), whose sum is σ = 77040320. Its totient is φ = 69183072.

The previous prime is 73107413. The next prime is 73107457. The reversal of 73107421 is 12470137.

It is a happy number.

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 73107421 - 2³ = 73107413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73107401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23281 + ... + 26233.

It is an arithmetic number, because the mean of its divisors is an integer number (9630040).

Almost surely, 2^73107421 is an apocalyptic number.

It is an amenable number.

73107421 is a deficient number, since it is larger than the sum of its proper divisors (3932899).

73107421 is a wasteful number, since it uses less digits than its factorization.

73107421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 73107421 is about 8550.2877729349. The cubic root of 73107421 is about 418.1388186168.

Adding to 73107421 its reverse (12470137), we get a palindrome (85577558).

The spelling of 73107421 in words is "seventy-three million, one hundred seven thousand, four hundred twenty-one".