1201805 has 8 divisors (see below), whose sum is σ = 1573344. Its totient is φ = 874000.

The previous prime is 1201793. The next prime is 1201813. The reversal of 1201805 is 5081021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201805 - 2¹² = 1197709 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10871 + ... + 10980.

It is an arithmetic number, because the mean of its divisors is an integer number (196668).

2^1201805 is an apocalyptic number.

It is an amenable number.

1201805 is a deficient number, since it is larger than the sum of its proper divisors (371539).

1201805 is a wasteful number, since it uses less digits than its factorization.

1201805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21867.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1201805 is about 1096.2686714487. The cubic root of 1201805 is about 106.3191107462.

Adding to 1201805 its reverse (5081021), we get a palindrome (6282826).

The spelling of 1201805 in words is "one million, two hundred one thousand, eight hundred five".