11781284 has 6 divisors (see below), whose sum is σ = 20617254. Its totient is φ = 5890640.

The previous prime is 11781257. The next prime is 11781307. The reversal of 11781284 is 48218711.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 16384 = 3430^2 + 128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11781284.

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 as a sum of consecutive naturals, namely, 1472657 + ... + 1472664.

It is an arithmetic number, because the mean of its divisors is an integer number (3436209).

Almost surely, 2^11781284 is an apocalyptic number.

It is an amenable number.

11781284 is a deficient number, since it is larger than the sum of its proper divisors (8835970).

11781284 is a wasteful number, since it uses less digits than its factorization.

11781284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945325 (or 2945323 counting only the distinct ones).

The product of its digits is 3584, while the sum is 32.

The square root of 11781284 is about 3432.3875072608. The cubic root of 11781284 is about 227.5433818168.

Adding to 11781284 its reverse (48218711), we get a palindrome (59999995).

The spelling of 11781284 in words is "eleven million, seven hundred eighty-one thousand, two hundred eighty-four".