12139620 has 24 divisors (see below), whose sum is σ = 33991104. Its totient is φ = 3237216.

The previous prime is 12139619. The next prime is 12139627. The reversal of 12139620 is 2693121.

12139620 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12139627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101104 + ... + 101223.

It is an arithmetic number, because the mean of its divisors is an integer number (1416296).

Almost surely, 2^12139620 is an apocalyptic number.

12139620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12139620 is an abundant number, since it is smaller than the sum of its proper divisors (21851484).

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

12139620 is a wasteful number, since it uses less digits than its factorization.

12139620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202339 (or 202337 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12139620 is about 3484.1957465102. The cubic root of 12139620 is about 229.8273436427.

The spelling of 12139620 in words is "twelve million, one hundred thirty-nine thousand, six hundred twenty".