12145369 has 4 divisors (see below), whose sum is σ = 12165796. Its totient is φ = 12124944.

The previous prime is 12145349. The next prime is 12145373. The reversal of 12145369 is 96354121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96354121 = 233 ⋅413537.

It can be written as a sum of positive squares in 2 ways, for example, as 34969 + 12110400 = 187^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145369 - 2⁷ = 12145241 is a prime.

It is a super-2 number, since 2×12145369² = 295019976292322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12145369.

It is not an unprimeable number, because it can be changed into a prime (12145319) 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 3 ways as a sum of consecutive naturals, for example, 9294 + ... + 10519.

It is an arithmetic number, because the mean of its divisors is an integer number (3041449).

Almost surely, 2^12145369 is an apocalyptic number.

It is an amenable number.

12145369 is a deficient number, since it is larger than the sum of its proper divisors (20427).

12145369 is an equidigital number, since it uses as much as digits as its factorization.

12145369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20426.

The product of its digits is 6480, while the sum is 31.

The square root of 12145369 is about 3485.0206599101. The cubic root of 12145369 is about 229.8636179489.

It can be divided in two parts, 121 and 45369, that multiplied together give a square (5489649 = 2343²).

The spelling of 12145369 in words is "twelve million, one hundred forty-five thousand, three hundred sixty-nine".