12078945 has 24 divisors (see below), whose sum is σ = 21229416. Its totient is φ = 6352128.

The previous prime is 12078923. The next prime is 12078947. The reversal of 12078945 is 54987021.

12078945 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2934369 + 9144576 = 1713^2 + 3024^2 .

It is not a de Polignac number, because 12078945 - 2⁶ = 12078881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12078947) 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, 1447 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (884559).

Almost surely, 2^12078945 is an apocalyptic number.

12078945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12078945 is a deficient number, since it is larger than the sum of its proper divisors (9150471).

12078945 is a wasteful number, since it uses less digits than its factorization.

12078945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761 (or 3758 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12078945 is about 3475.4776650124. The cubic root of 12078945 is about 229.4438041457.

The spelling of 12078945 in words is "twelve million, seventy-eight thousand, nine hundred forty-five".