1201866 has 16 divisors (see below), whose sum is σ = 2545344. Its totient is φ = 377024.

The previous prime is 1201853. The next prime is 1201873. The reversal of 1201866 is 6681021.

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, 5790 + ... + 5993.

It is an arithmetic number, because the mean of its divisors is an integer number (159084).

2^1201866 is an apocalyptic number.

1201866 is an abundant number, since it is smaller than the sum of its proper divisors (1343478).

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

1201866 is a wasteful number, since it uses less digits than its factorization.

1201866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1201866 is about 1096.2964927427. The cubic root of 1201866 is about 106.3209095283.

Adding to 1201866 its reverse (6681021), we get a palindrome (7882887).

The spelling of 1201866 in words is "one million, two hundred one thousand, eight hundred sixty-six".