12355145 has 16 divisors (see below), whose sum is σ = 16571520. Its totient is φ = 8764800.

The previous prime is 12355139. The next prime is 12355153. The reversal of 12355145 is 54155321.

It is not a de Polignac number, because 12355145 - 2⁴ = 12355129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485 + ... + 4994.

It is an arithmetic number, because the mean of its divisors is an integer number (1035720).

Almost surely, 2^12355145 is an apocalyptic number.

It is an amenable number.

12355145 is a deficient number, since it is larger than the sum of its proper divisors (4216375).

12355145 is a wasteful number, since it uses less digits than its factorization.

12355145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536.

The product of its digits is 3000, while the sum is 26.

The square root of 12355145 is about 3514.9886201807. The cubic root of 12355145 is about 231.1794798361.

It can be divided in two parts, 12 and 355145, that multiplied together give a triangular number (4261740 = T₂₉₁₉).

The spelling of 12355145 in words is "twelve million, three hundred fifty-five thousand, one hundred forty-five".