1201806 has 24 divisors (see below), whose sum is σ = 2625480. Its totient is φ = 397296.

The previous prime is 1201793. The next prime is 1201813. The reversal of 1201806 is 6081021.

It is a super-4 number, since 4×1201806⁴ (a number of 25 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam 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 11 ways as a sum of consecutive naturals, for example, 3036 + ... + 3408.

It is an arithmetic number, because the mean of its divisors is an integer number (109395).

2^1201806 is an apocalyptic number.

1201806 is an abundant number, since it is smaller than the sum of its proper divisors (1423674).

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

1201806 is a wasteful number, since it uses less digits than its factorization.

1201806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1201806 is about 1096.2691275412. The cubic root of 1201806 is about 106.3191402350.

Adding to 1201806 its reverse (6081021), we get a palindrome (7282827).

The spelling of 1201806 in words is "one million, two hundred one thousand, eight hundred six".