12201805 has 32 divisors (see below), whose sum is σ = 18724608. Its totient is φ = 7411200.

The previous prime is 12201803. The next prime is 12201821. The reversal of 12201805 is 50810221.

It is not a de Polignac number, because 12201805 - 2¹ = 12201803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15399 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (585144).

Almost surely, 2^12201805 is an apocalyptic number.

It is an amenable number.

12201805 is a deficient number, since it is larger than the sum of its proper divisors (6522803).

12201805 is a wasteful number, since it uses less digits than its factorization.

12201805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12201805 is about 3493.1082147566. The cubic root of 12201805 is about 230.2191043783.

It can be divided in two parts, 1220180 and 5, that multiplied together give a square (6100900 = 2470²).

The spelling of 12201805 in words is "twelve million, two hundred one thousand, eight hundred five".