12145990 has 32 divisors (see below), whose sum is σ = 23786784. Its totient is φ = 4446720.

The previous prime is 12145981. The next prime is 12145993. The reversal of 12145990 is 9954121.

12145990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145993) 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, 5325 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (743337).

Almost surely, 2^12145990 is an apocalyptic number.

12145990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12145990 is a deficient number, since it is larger than the sum of its proper divisors (11640794).

12145990 is a wasteful number, since it uses less digits than its factorization.

12145990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 12145990 is about 3485.1097543693. The cubic root of 12145990 is about 229.8675355704.

The spelling of 12145990 in words is "twelve million, one hundred forty-five thousand, nine hundred ninety".