12478145 has 8 divisors (see below), whose sum is σ = 15339240. Its totient is φ = 9738880.

The previous prime is 12478133. The next prime is 12478157. The reversal of 12478145 is 54187421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12478133) and next prime (12478157).

It can be written as a sum of positive squares in 4 ways, for example, as 339889 + 12138256 = 583^2 + 3484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12478145 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 30230 + ... + 30639.

It is an arithmetic number, because the mean of its divisors is an integer number (1917405).

Almost surely, 2^12478145 is an apocalyptic number.

It is an amenable number.

12478145 is a deficient number, since it is larger than the sum of its proper divisors (2861095).

12478145 is an equidigital number, since it uses as much as digits as its factorization.

12478145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60915.

The product of its digits is 8960, while the sum is 32.

The square root of 12478145 is about 3532.4417900370. The cubic root of 12478145 is about 231.9441068782.

The spelling of 12478145 in words is "twelve million, four hundred seventy-eight thousand, one hundred forty-five".