11921072 has 10 divisors (see below), whose sum is σ = 23097108. Its totient is φ = 5960528.

The previous prime is 11921071. The next prime is 11921083. The reversal of 11921072 is 27012911.

It is a super-2 number, since 2×11921072² = 284223915258368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11921071) 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, 372518 + ... + 372549.

Almost surely, 2^11921072 is an apocalyptic number.

It is an amenable number.

11921072 is a deficient number, since it is larger than the sum of its proper divisors (11176036).

11921072 is an equidigital number, since it uses as much as digits as its factorization.

11921072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745075 (or 745069 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 11921072 is about 3452.6905450677. The cubic root of 11921072 is about 228.4397995100.

Adding to 11921072 its reverse (27012911), we get a palindrome (38933983).

The spelling of 11921072 in words is "eleven million, nine hundred twenty-one thousand, seventy-two".