78141111 has 16 divisors (see below), whose sum is σ = 107965440. Its totient is φ = 50218560.

The previous prime is 78141079. The next prime is 78141127. The reversal of 78141111 is 11114187.

78141111 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 78141111 - 2⁵ = 78141079 is a prime.

It is a super-2 number, since 2×78141111² = 12212066456628642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78141181) 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, 24835 + ... + 27803.

It is an arithmetic number, because the mean of its divisors is an integer number (6747840).

Almost surely, 2^78141111 is an apocalyptic number.

78141111 is a deficient number, since it is larger than the sum of its proper divisors (29824329).

78141111 is a wasteful number, since it uses less digits than its factorization.

78141111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its digits is 224, while the sum is 24.

The square root of 78141111 is about 8839.7460936387. The cubic root of 78141111 is about 427.5233707000.

Adding to 78141111 its reverse (11114187), we get a palindrome (89255298).

The spelling of 78141111 in words is "seventy-eight million, one hundred forty-one thousand, one hundred eleven".