12020145 has 16 divisors (see below), whose sum is σ = 20068992. Its totient is φ = 6131840.

The previous prime is 12020137. The next prime is 12020161. The reversal of 12020145 is 54102021.

It is not a de Polignac number, because 12020145 - 2³ = 12020137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17076 + ... + 17765.

It is an arithmetic number, because the mean of its divisors is an integer number (1254312).

Almost surely, 2^12020145 is an apocalyptic number.

12020145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12020145 is a deficient number, since it is larger than the sum of its proper divisors (8048847).

12020145 is a wasteful number, since it uses less digits than its factorization.

12020145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34872.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12020145 is about 3467.0080761371. The cubic root of 12020145 is about 229.0708894901.

Adding to 12020145 its reverse (54102021), we get a palindrome (66122166).

It can be divided in two parts, 120201 and 45, that multiplied together give a palindrome (5409045).

The spelling of 12020145 in words is "twelve million, twenty thousand, one hundred forty-five".