11221572 has 24 divisors (see below), whose sum is σ = 26348896. Its totient is φ = 3716928.

The previous prime is 11221559. The next prime is 11221601. The reversal of 11221572 is 27512211.

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 7 ways as a sum of consecutive naturals, for example, 913 + ... + 4824.

Almost surely, 2^11221572 is an apocalyptic number.

11221572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11221572 is an abundant number, since it is smaller than the sum of its proper divisors (15127324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221572 is a wasteful number, since it uses less digits than its factorization.

11221572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907 (or 5905 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 11221572 is about 3349.8614896739. The cubic root of 11221572 is about 223.8813412786.

Adding to 11221572 its reverse (27512211), we get a palindrome (38733783).

The spelling of 11221572 in words is "eleven million, two hundred twenty-one thousand, five hundred seventy-two".