123455111 has 4 divisors (see below), whose sum is σ = 132951672. Its totient is φ = 113958552.

The previous prime is 123455089. The next prime is 123455119. The reversal of 123455111 is 111554321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111554321 = 241 ⋅462881.

It is a cyclic number.

It is not a de Polignac number, because 123455111 - 2²² = 119260807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455119) 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, 4748261 + ... + 4748286.

It is an arithmetic number, because the mean of its divisors is an integer number (33237918).

Almost surely, 2^123455111 is an apocalyptic number.

123455111 is a deficient number, since it is larger than the sum of its proper divisors (9496561).

123455111 is an equidigital number, since it uses as much as digits as its factorization.

123455111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496560.

The product of its digits is 600, while the sum is 23.

The square root of 123455111 is about 11111.0355502986. The cubic root of 123455111 is about 497.9316032688.

The spelling of 123455111 in words is "one hundred twenty-three million, four hundred fifty-five thousand, one hundred eleven".