1200505 has 4 divisors (see below), whose sum is σ = 1440612. Its totient is φ = 960400.

The previous prime is 1200499. The next prime is 1200509. The reversal of 1200505 is 5050021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 958441 + 242064 = 979^2 + 492^2 .

It is not a de Polignac number, because 1200505 - 2⁷ = 1200377 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1200505 is a modest number, since divided by 505 gives 120 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200509) 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, 120046 + ... + 120055.

It is an arithmetic number, because the mean of its divisors is an integer number (360153).

2^1200505 is an apocalyptic number.

It is an amenable number.

1200505 is a deficient number, since it is larger than the sum of its proper divisors (240107).

1200505 is an equidigital number, since it uses as much as digits as its factorization.

1200505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240106.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 1200505 is about 1095.6755906745. The cubic root of 1200505 is about 106.2807615659.

Adding to 1200505 its reverse (5050021), we get a palindrome (6250526).

The spelling of 1200505 in words is "one million, two hundred thousand, five hundred five".