111401555 has 8 divisors (see below), whose sum is σ = 135873744. Its totient is φ = 87660000.

The previous prime is 111401539. The next prime is 111401599. The reversal of 111401555 is 555104111.

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

It is not a de Polignac number, because 111401555 - 2⁴ = 111401539 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 111401555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182321 + ... + 182930.

It is an arithmetic number, because the mean of its divisors is an integer number (16984218).

Almost surely, 2^111401555 is an apocalyptic number.

111401555 is a deficient number, since it is larger than the sum of its proper divisors (24472189).

111401555 is an equidigital number, since it uses as much as digits as its factorization.

111401555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365317.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 111401555 is about 10554.6935057348. The cubic root of 111401555 is about 481.1683848778.

Adding to 111401555 its reverse (555104111), we get a palindrome (666505666).

The spelling of 111401555 in words is "one hundred eleven million, four hundred one thousand, five hundred fifty-five".