12145387 has 2 divisors, whose sum is σ = 12145388. Its totient is φ = 12145386.

The previous prime is 12145379. The next prime is 12145417. The reversal of 12145387 is 78354121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12145387 - 2³ = 12145379 is a prime.

It is not a weakly prime, because it can be changed into another prime (12143387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6072693 + 6072694.

It is an arithmetic number, because the mean of its divisors is an integer number (6072694).

Almost surely, 2^12145387 is an apocalyptic number.

12145387 is a deficient number, since it is larger than the sum of its proper divisors (1).

12145387 is an equidigital number, since it uses as much as digits as its factorization.

12145387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 12145387 is about 3485.0232423902. The cubic root of 12145387 is about 229.8637315050.

The spelling of 12145387 in words is "twelve million, one hundred forty-five thousand, three hundred eighty-seven".