12078571 has 4 divisors (see below), whose sum is σ = 12359512. Its totient is φ = 11797632.

The previous prime is 12078569. The next prime is 12078581. The reversal of 12078571 is 17587021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17587021 = 29 ⋅606449.

It is a cyclic number.

It is not a de Polignac number, because 12078571 - 2¹ = 12078569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12078511) 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, 140406 + ... + 140491.

It is an arithmetic number, because the mean of its divisors is an integer number (3089878).

Almost surely, 2^12078571 is an apocalyptic number.

12078571 is a deficient number, since it is larger than the sum of its proper divisors (280941).

12078571 is an equidigital number, since it uses as much as digits as its factorization.

12078571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280940.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 12078571 is about 3475.4238590422. The cubic root of 12078571 is about 229.4414360341.

The spelling of 12078571 in words is "twelve million, seventy-eight thousand, five hundred seventy-one".