111291054 has 48 divisors (see below), whose sum is σ = 267296256. Its totient is φ = 30769200.

The previous prime is 111291053. The next prime is 111291109. The reversal of 111291054 is 450192111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111291053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3009 + ... + 15219.

It is an arithmetic number, because the mean of its divisors is an integer number (5568672).

Almost surely, 2^111291054 is an apocalyptic number.

111291054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111291054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133648128).

111291054 is an abundant number, since it is smaller than the sum of its proper divisors (156005202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111291054 is a wasteful number, since it uses less digits than its factorization.

111291054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12261 (or 12254 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 111291054 is about 10549.4575215980. The cubic root of 111291054 is about 481.0092393515.

The spelling of 111291054 in words is "one hundred eleven million, two hundred ninety-one thousand, fifty-four".