12120045 has 16 divisors (see below), whose sum is σ = 22162560. Its totient is φ = 5540544.

The previous prime is 12120019. The next prime is 12120047. The reversal of 12120045 is 54002121.

It is not a de Polignac number, because 12120045 - 2¹⁰ = 12119021 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57610 + ... + 57819.

It is an arithmetic number, because the mean of its divisors is an integer number (1385160).

Almost surely, 2^12120045 is an apocalyptic number.

12120045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12120045 is a deficient number, since it is larger than the sum of its proper divisors (10042515).

12120045 is a wasteful number, since it uses less digits than its factorization.

12120045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115444.

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

The square root of 12120045 is about 3481.3855000560. The cubic root of 12120045 is about 229.7037458545.

Adding to 12120045 its reverse (54002121), we get a palindrome (66122166).

The spelling of 12120045 in words is "twelve million, one hundred twenty thousand, forty-five".