12904181 has 2 divisors, whose sum is σ = 12904182. Its totient is φ = 12904180.

The previous prime is 12904169. The next prime is 12904187. The reversal of 12904181 is 18140921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 3964081 = 2990^2 + 1991^2 .

It is a cyclic number.

It is not a de Polignac number, because 12904181 - 2⁶ = 12904117 is a prime.

It is a super-2 number, since 2×12904181² = 333035774561522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12904181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12904187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452090 + 6452091.

It is an arithmetic number, because the mean of its divisors is an integer number (6452091).

Almost surely, 2^12904181 is an apocalyptic number.

It is an amenable number.

12904181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12904181 is an equidigital number, since it uses as much as digits as its factorization.

12904181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 12904181 is about 3592.2389953899. The cubic root of 12904181 is about 234.5543447681.

The spelling of 12904181 in words is "twelve million, nine hundred four thousand, one hundred eighty-one".