11772005 has 12 divisors (see below), whose sum is σ = 16433100. Its totient is φ = 8072064.

The previous prime is 11771983. The next prime is 11772029. The reversal of 11772005 is 50027711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2328676 + 9443329 = 1526^2 + 3073^2 .

It is not a de Polignac number, because 11772005 - 2¹⁰ = 11770981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23780 + ... + 24269.

It is an arithmetic number, because the mean of its divisors is an integer number (1369425).

Almost surely, 2^11772005 is an apocalyptic number.

It is an amenable number.

11772005 is a deficient number, since it is larger than the sum of its proper divisors (4661095).

11772005 is an equidigital number, since it uses as much as digits as its factorization.

11772005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48068 (or 48061 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 11772005 is about 3431.0355579621. The cubic root of 11772005 is about 227.4836280131.

Adding to 11772005 its reverse (50027711), we get a palindrome (61799716).

The spelling of 11772005 in words is "eleven million, seven hundred seventy-two thousand, five".