12138270 has 32 divisors (see below), whose sum is σ = 29233440. Its totient is φ = 3225600.

The previous prime is 12138263. The next prime is 12138277. The reversal of 12138270 is 7283121.

It is an interprime number because it is at equal distance from previous prime (12138263) and next prime (12138277).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12138270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138277) 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, 11526 + ... + 12534.

It is an arithmetic number, because the mean of its divisors is an integer number (913545).

Almost surely, 2^12138270 is an apocalyptic number.

12138270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12138270 is an abundant number, since it is smaller than the sum of its proper divisors (17095170).

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

12138270 is a wasteful number, since it uses less digits than its factorization.

12138270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12138270 is about 3484.0020091843. The cubic root of 12138270 is about 229.8188239247.

The spelling of 12138270 in words is "twelve million, one hundred thirty-eight thousand, two hundred seventy".