12989145 has 32 divisors (see below), whose sum is σ = 22780800. Its totient is φ = 6280704.

The previous prime is 12989143. The next prime is 12989149. The reversal of 12989145 is 54198921.

12989145 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12989145 - 2¹ = 12989143 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12989143) 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, 10941 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (711900).

Almost surely, 2^12989145 is an apocalyptic number.

12989145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12989145 is a deficient number, since it is larger than the sum of its proper divisors (9791655).

12989145 is a wasteful number, since it uses less digits than its factorization.

12989145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its digits is 25920, while the sum is 39.

The square root of 12989145 is about 3604.0456434402. The cubic root of 12989145 is about 235.0680050658.

The spelling of 12989145 in words is "twelve million, nine hundred eighty-nine thousand, one hundred forty-five".