12378145 has 16 divisors (see below), whose sum is σ = 16515072. Its totient is φ = 8844480.

The previous prime is 12378131. The next prime is 12378151. The reversal of 12378145 is 54187321.

It is not a de Polignac number, because 12378145 - 2¹¹ = 12376097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057 + ... + 5086.

It is an arithmetic number, because the mean of its divisors is an integer number (1032192).

Almost surely, 2^12378145 is an apocalyptic number.

It is an amenable number.

12378145 is a deficient number, since it is larger than the sum of its proper divisors (4136927).

12378145 is a wasteful number, since it uses less digits than its factorization.

12378145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192.

The product of its digits is 6720, while the sum is 31.

The square root of 12378145 is about 3518.2588023055. The cubic root of 12378145 is about 231.3228433778.

The spelling of 12378145 in words is "twelve million, three hundred seventy-eight thousand, one hundred forty-five".