12178541 has 2 divisors, whose sum is σ = 12178542. Its totient is φ = 12178540.

The previous prime is 12178501. The next prime is 12178547. The reversal of 12178541 is 14587121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 137641 = 3470^2 + 371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12178541 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12178547) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6089270 + 6089271.

It is an arithmetic number, because the mean of its divisors is an integer number (6089271).

Almost surely, 2^12178541 is an apocalyptic number.

It is an amenable number.

12178541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12178541 is an equidigital number, since it uses as much as digits as its factorization.

12178541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 12178541 is about 3489.7766404170. The cubic root of 12178541 is about 230.0726991358.

The spelling of 12178541 in words is "twelve million, one hundred seventy-eight thousand, five hundred forty-one".