1205801 has 4 divisors (see below), whose sum is σ = 1208004. Its totient is φ = 1203600.

The previous prime is 1205779. The next prime is 1205819. The reversal of 1205801 is 1085021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1085021 = 7 ⋅155003.

It can be written as a sum of positive squares in 2 ways, for example, as 931225 + 274576 = 965^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205801 - 2¹⁴ = 1189417 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205801.

It is not an unprimeable number, because it can be changed into a prime (1205891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (302001).

2^1205801 is an apocalyptic number.

It is an amenable number.

1205801 is a deficient number, since it is larger than the sum of its proper divisors (2203).

1205801 is a wasteful number, since it uses less digits than its factorization.

1205801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202.

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

The square root of 1205801 is about 1098.0897048966. The cubic root of 1205801 is about 106.4368173509.

The spelling of 1205801 in words is "one million, two hundred five thousand, eight hundred one".