12145040 has 20 divisors (see below), whose sum is σ = 28237404. Its totient is φ = 4857984.

The previous prime is 12145033. The next prime is 12145043. The reversal of 12145040 is 4054121.

It can be written as a sum of positive squares in 2 ways, for example, as 1281424 + 10863616 = 1132^2 + 3296^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12145043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75827 + ... + 75986.

Almost surely, 2^12145040 is an apocalyptic number.

12145040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12145040 is an abundant number, since it is smaller than the sum of its proper divisors (16092364).

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

12145040 is a wasteful number, since it uses less digits than its factorization.

12145040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151826 (or 151820 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12145040 is about 3484.9734575747. The cubic root of 12145040 is about 229.8615423756.

Adding to 12145040 its reverse (4054121), we get a palindrome (16199161).

The spelling of 12145040 in words is "twelve million, one hundred forty-five thousand, forty".