12138770 has 32 divisors (see below), whose sum is σ = 25488000. Its totient is φ = 4160688.

The previous prime is 12138767. The next prime is 12138793. The reversal of 12138770 is 7783121.

It is a super-2 number, since 2×12138770² = 294699474225800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1661 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (796500).

Almost surely, 2^12138770 is an apocalyptic number.

12138770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12138770 is an abundant number, since it is smaller than the sum of its proper divisors (13349230).

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

12138770 is an equidigital number, since it uses as much as digits as its factorization.

12138770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 12138770 is about 3484.0737650056. The cubic root of 12138770 is about 229.8219794495.

The spelling of 12138770 in words is "twelve million, one hundred thirty-eight thousand, seven hundred seventy".