111240001 has 4 divisors (see below), whose sum is σ = 111275604. Its totient is φ = 111204400.

The previous prime is 111239987. The next prime is 111240013. The reversal of 111240001 is 100042111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74649600 + 36590401 = 8640^2 + 6049^2 .

It is a cyclic number.

It is not a de Polignac number, because 111240001 - 2⁹ = 111239489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111240001.

It is not an unprimeable number, because it can be changed into a prime (111241001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12610 + ... + 19531.

It is an arithmetic number, because the mean of its divisors is an integer number (27818901).

Almost surely, 2^111240001 is an apocalyptic number.

It is an amenable number.

111240001 is a deficient number, since it is larger than the sum of its proper divisors (35603).

111240001 is an equidigital number, since it uses as much as digits as its factorization.

111240001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35602.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 111240001 is about 10547.0375461548. The cubic root of 111240001 is about 480.9356763237.

Adding to 111240001 its reverse (100042111), we get a palindrome (211282112).

The spelling of 111240001 in words is "one hundred eleven million, two hundred forty thousand, one".