12247845 has 32 divisors (see below), whose sum is σ = 20680704. Its totient is φ = 6177600.

The previous prime is 12247843. The next prime is 12247901. The reversal of 12247845 is 54874221.

It is not a de Polignac number, because 12247845 - 2¹ = 12247843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12247841) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 45060 + ... + 45330.

It is an arithmetic number, because the mean of its divisors is an integer number (646272).

Almost surely, 2^12247845 is an apocalyptic number.

12247845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12247845 is a deficient number, since it is larger than the sum of its proper divisors (8432859).

12247845 is a wasteful number, since it uses less digits than its factorization.

12247845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its digits is 17920, while the sum is 33.

The square root of 12247845 is about 3499.6921293165. The cubic root of 12247845 is about 230.5082961364.

The spelling of 12247845 in words is "twelve million, two hundred forty-seven thousand, eight hundred forty-five".