12290745 has 32 divisors (see below), whose sum is σ = 21022848. Its totient is φ = 6110208.

The previous prime is 12290743. The next prime is 12290749. The reversal of 12290745 is 54709221.

12290745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12290745 - 2¹ = 12290743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12290743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39882 + ... + 40188.

It is an arithmetic number, because the mean of its divisors is an integer number (656964).

Almost surely, 2^12290745 is an apocalyptic number.

12290745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12290745 is a deficient number, since it is larger than the sum of its proper divisors (8732103).

12290745 is a wasteful number, since it uses less digits than its factorization.

12290745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12290745 is about 3505.8158822163. The cubic root of 12290745 is about 230.7771130214. Note that the first 3 decimals are identical.

Adding to 12290745 its reverse (54709221), we get a palindrome (66999966).

The spelling of 12290745 in words is "twelve million, two hundred ninety thousand, seven hundred forty-five".