12077391 has 4 divisors (see below), whose sum is σ = 16103192. Its totient is φ = 8051592.

The previous prime is 12077371. The next prime is 12077393. The reversal of 12077391 is 19377021.

12077391 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12077391 - 2¹⁵ = 12044623 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 (12077393) 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, 2012896 + ... + 2012901.

It is an arithmetic number, because the mean of its divisors is an integer number (4025798).

Almost surely, 2^12077391 is an apocalyptic number.

12077391 is a deficient number, since it is larger than the sum of its proper divisors (4025801).

12077391 is an equidigital number, since it uses as much as digits as its factorization.

12077391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025800.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 12077391 is about 3475.2540914299. The cubic root of 12077391 is about 229.4339641317.

The spelling of 12077391 in words is "twelve million, seventy-seven thousand, three hundred ninety-one".