11871722 has 4 divisors (see below), whose sum is σ = 17807586. Its totient is φ = 5935860.

The previous prime is 11871721. The next prime is 11871731. The reversal of 11871722 is 22717811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22717811 = 439 ⋅51749.

It can be written as a sum of positive squares in only one way, i.e., 11095561 + 776161 = 3331^2 + 881^2 .

It is not an unprimeable number, because it can be changed into a prime (11871721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2967929 + ... + 2967932.

Almost surely, 2^11871722 is an apocalyptic number.

11871722 is a deficient number, since it is larger than the sum of its proper divisors (5935864).

11871722 is an equidigital number, since it uses as much as digits as its factorization.

11871722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935863.

The product of its digits is 1568, while the sum is 29.

The square root of 11871722 is about 3445.5365329655. The cubic root of 11871722 is about 228.1241372833.

The spelling of 11871722 in words is "eleven million, eight hundred seventy-one thousand, seven hundred twenty-two".