12400073 has 8 divisors (see below), whose sum is σ = 14312640. Its totient is φ = 10522800.

The previous prime is 12400049. The next prime is 12400097. The reversal of 12400073 is 37000421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12400049) and next prime (12400097).

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 12400073 - 2⁶ = 12400009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400043) 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, 8063 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (1789080).

Almost surely, 2^12400073 is an apocalyptic number.

It is an amenable number.

12400073 is a deficient number, since it is larger than the sum of its proper divisors (1912567).

12400073 is a wasteful number, since it uses less digits than its factorization.

12400073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17647.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 12400073 is about 3521.3737376200. The cubic root of 12400073 is about 231.4593596587.

Adding to 12400073 its reverse (37000421), we get a palindrome (49400494).

The spelling of 12400073 in words is "twelve million, four hundred thousand, seventy-three".