12279945 has 16 divisors (see below), whose sum is σ = 19760832. Its totient is φ = 6511680.

The previous prime is 12279919. The next prime is 12279959. The reversal of 12279945 is 54997221.

It is not a de Polignac number, because 12279945 - 2¹⁴ = 12263561 is a prime.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 454 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (1235052).

Almost surely, 2^12279945 is an apocalyptic number.

12279945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12279945 is a deficient number, since it is larger than the sum of its proper divisors (7480887).

12279945 is a wasteful number, since it uses less digits than its factorization.

12279945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4712.

The product of its digits is 45360, while the sum is 39.

The square root of 12279945 is about 3504.2752460388. The cubic root of 12279945 is about 230.7094978305.

The spelling of 12279945 in words is "twelve million, two hundred seventy-nine thousand, nine hundred forty-five".