11720445 has 32 divisors (see below), whose sum is σ = 20611584. Its totient is φ = 5640000.

The previous prime is 11720431. The next prime is 11720447. The reversal of 11720445 is 54402711.

It is not a de Polignac number, because 11720445 - 2⁹ = 11719933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41274 + ... + 41556.

It is an arithmetic number, because the mean of its divisors is an integer number (644112).

Almost surely, 2^11720445 is an apocalyptic number.

11720445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11720445 is a deficient number, since it is larger than the sum of its proper divisors (8891139).

11720445 is a wasteful number, since it uses less digits than its factorization.

11720445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 11720445 is about 3423.5135460518. The cubic root of 11720445 is about 227.1510247562.

The spelling of 11720445 in words is "eleven million, seven hundred twenty thousand, four hundred forty-five".