12456145 has 12 divisors (see below), whose sum is σ = 16186716. Its totient is φ = 9197760.

The previous prime is 12456131. The next prime is 12456151. The reversal of 12456145 is 54165421.

It can be written as a sum of positive squares in 6 ways, for example, as 283024 + 12173121 = 532^2 + 3489^2 .

It is not a de Polignac number, because 12456145 - 2⁹ = 12455633 is a prime.

It is a super-2 number, since 2×12456145² = 310311096522050, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6526 + ... + 8215.

It is an arithmetic number, because the mean of its divisors is an integer number (1348893).

Almost surely, 2^12456145 is an apocalyptic number.

It is an amenable number.

12456145 is a deficient number, since it is larger than the sum of its proper divisors (3730571).

12456145 is a wasteful number, since it uses less digits than its factorization.

12456145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14772 (or 14759 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 12456145 is about 3529.3264229878. The cubic root of 12456145 is about 231.8077144855.

The spelling of 12456145 in words is "twelve million, four hundred fifty-six thousand, one hundred forty-five".