111856001 has 4 divisors (see below), whose sum is σ = 113112900. Its totient is φ = 110599104.

The previous prime is 111855977. The next prime is 111856007. The reversal of 111856001 is 100658111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100658111 = 2683 ⋅37517.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 90916225 = 4576^2 + 9535^2 .

It is a cyclic number.

It is not a de Polignac number, because 111856001 - 2¹⁸ = 111593857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111856007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628316 + ... + 628493.

It is an arithmetic number, because the mean of its divisors is an integer number (28278225).

Almost surely, 2^111856001 is an apocalyptic number.

It is an amenable number.

111856001 is a deficient number, since it is larger than the sum of its proper divisors (1256899).

111856001 is an equidigital number, since it uses as much as digits as its factorization.

111856001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256898.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 111856001 is about 10576.1997428188. The cubic root of 111856001 is about 481.8217820491.

The spelling of 111856001 in words is "one hundred eleven million, eight hundred fifty-six thousand, one".