111878143 has 16 divisors (see below), whose sum is σ = 125455680. Its totient is φ = 99058176.

The previous prime is 111878113. The next prime is 111878149. The reversal of 111878143 is 341878111.

It is a cyclic number.

It is not a de Polignac number, because 111878143 - 2¹³ = 111869951 is a prime.

It is a super-2 number, since 2×111878143² = 25033437762256898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111878099 and 111878108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111878149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62071 + ... + 63847.

It is an arithmetic number, because the mean of its divisors is an integer number (7840980).

Almost surely, 2^111878143 is an apocalyptic number.

111878143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111878143 is a deficient number, since it is larger than the sum of its proper divisors (13577537).

111878143 is a wasteful number, since it uses less digits than its factorization.

111878143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its digits is 5376, while the sum is 34.

The square root of 111878143 is about 10577.2464753356. The cubic root of 111878143 is about 481.8535723090.

The spelling of 111878143 in words is "one hundred eleven million, eight hundred seventy-eight thousand, one hundred forty-three".