12136890 has 32 divisors (see below), whose sum is σ = 29626560. Its totient is φ = 3181184.

The previous prime is 12136889. The next prime is 12136897. The reversal of 12136890 is 9863121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12136897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1659 + ... + 5198.

It is an arithmetic number, because the mean of its divisors is an integer number (925830).

Almost surely, 2^12136890 is an apocalyptic number.

12136890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12136890 is an abundant number, since it is smaller than the sum of its proper divisors (17489670).

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

12136890 is a wasteful number, since it uses less digits than its factorization.

12136890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12136890 is about 3483.8039554487. The cubic root of 12136890 is about 229.8101142268.

The spelling of 12136890 in words is "twelve million, one hundred thirty-six thousand, eight hundred ninety".