12145133 has 24 divisors (see below), whose sum is σ = 16445184. Its totient is φ = 8727840.

The previous prime is 12145103. The next prime is 12145151. The reversal of 12145133 is 33154121.

It is not a de Polignac number, because 12145133 - 2⁶ = 12145069 is a prime.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10460 + ... + 11562.

It is an arithmetic number, because the mean of its divisors is an integer number (685216).

Almost surely, 2^12145133 is an apocalyptic number.

12145133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12145133 is a deficient number, since it is larger than the sum of its proper divisors (4300051).

12145133 is a wasteful number, since it uses less digits than its factorization.

12145133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1134 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 12145133 is about 3484.9868005489. The cubic root of 12145133 is about 229.8621290916.

Adding to 12145133 its reverse (33154121), we get a palindrome (45299254).

It can be divided in two parts, 121 and 45133, that added together give a palindrome (45254).

The spelling of 12145133 in words is "twelve million, one hundred forty-five thousand, one hundred thirty-three".