12078045 has 32 divisors (see below), whose sum is σ = 24541440. Its totient is φ = 5520960.

The previous prime is 12078043. The next prime is 12078047. The reversal of 12078045 is 54087021.

It is an interprime number because it is at equal distance from previous prime (12078043) and next prime (12078047).

It is not a de Polignac number, because 12078045 - 2¹ = 12078043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12078043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5446 + ... + 7335.

It is an arithmetic number, because the mean of its divisors is an integer number (766920).

Almost surely, 2^12078045 is an apocalyptic number.

12078045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12078045 is an abundant number, since it is smaller than the sum of its proper divisors (12463395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12078045 is a wasteful number, since it uses less digits than its factorization.

12078045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12802 (or 12796 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12078045 is about 3475.3481839954. The cubic root of 12078045 is about 229.4381053987.

The spelling of 12078045 in words is "twelve million, seventy-eight thousand, forty-five".