12155029 has 2 divisors, whose sum is σ = 12155030. Its totient is φ = 12155028.

The previous prime is 12155023. The next prime is 12155057. The reversal of 12155029 is 92055121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 492804 = 3415^2 + 702^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155029 - 2³ = 12155021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12154994 and 12155012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077514 + 6077515.

It is an arithmetic number, because the mean of its divisors is an integer number (6077515).

Almost surely, 2^12155029 is an apocalyptic number.

It is an amenable number.

12155029 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155029 is an equidigital number, since it uses as much as digits as its factorization.

12155029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 12155029 is about 3486.4063159649. The cubic root of 12155029 is about 229.9245436156.

The spelling of 12155029 in words is "twelve million, one hundred fifty-five thousand, twenty-nine".