111145601 has 8 divisors (see below), whose sum is σ = 128813184. Its totient is φ = 93925440.

The previous prime is 111145597. The next prime is 111145663. The reversal of 111145601 is 106541111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111145601 - 2² = 111145597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111145691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111320 + ... + 112313.

It is an arithmetic number, because the mean of its divisors is an integer number (16101648).

Almost surely, 2^111145601 is an apocalyptic number.

It is an amenable number.

111145601 is a deficient number, since it is larger than the sum of its proper divisors (17667583).

111145601 is an equidigital number, since it uses as much as digits as its factorization.

111145601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223711.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 111145601 is about 10542.5614060341. The cubic root of 111145601 is about 480.7995946506.

Adding to 111145601 its reverse (106541111), we get a palindrome (217686712).

The spelling of 111145601 in words is "one hundred eleven million, one hundred forty-five thousand, six hundred one".