12400727 has 4 divisors (see below), whose sum is σ = 12689160. Its totient is φ = 12112296.

The previous prime is 12400721. The next prime is 12400741. The reversal of 12400727 is 72700421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72700421 = 41 ⋅1773181.

It is a cyclic number.

It is not a de Polignac number, because 12400727 - 2¹⁴ = 12384343 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 (12400721) 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, 144152 + ... + 144237.

It is an arithmetic number, because the mean of its divisors is an integer number (3172290).

Almost surely, 2^12400727 is an apocalyptic number.

12400727 is a deficient number, since it is larger than the sum of its proper divisors (288433).

12400727 is an equidigital number, since it uses as much as digits as its factorization.

12400727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288432.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 12400727 is about 3521.4665978822. The cubic root of 12400727 is about 231.4634287681.

The spelling of 12400727 in words is "twelve million, four hundred thousand, seven hundred twenty-seven".