12120945 has 16 divisors (see below), whose sum is σ = 19567872. Its totient is φ = 6406400.

The previous prime is 12120929. The next prime is 12120947. The reversal of 12120945 is 54902121.

It is not a de Polignac number, because 12120945 - 2⁴ = 12120929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12120947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1881 + ... + 5270.

It is an arithmetic number, because the mean of its divisors is an integer number (1222992).

Almost surely, 2^12120945 is an apocalyptic number.

12120945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12120945 is a deficient number, since it is larger than the sum of its proper divisors (7446927).

12120945 is a wasteful number, since it uses less digits than its factorization.

12120945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7272.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 12120945 is about 3481.5147565392. The cubic root of 12120945 is about 229.7094314289.

The spelling of 12120945 in words is "twelve million, one hundred twenty thousand, nine hundred forty-five".