123012135 has 16 divisors (see below), whose sum is σ = 218688480. Its totient is φ = 65606400.

The previous prime is 123012107. The next prime is 123012143. The reversal of 123012135 is 531210321.

It is not a de Polignac number, because 123012135 - 2⁵ = 123012103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455466 + ... + 455735.

It is an arithmetic number, because the mean of its divisors is an integer number (13668030).

Almost surely, 2^123012135 is an apocalyptic number.

123012135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123012135 is a deficient number, since it is larger than the sum of its proper divisors (95676345).

123012135 is an equidigital number, since it uses as much as digits as its factorization.

123012135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911215 (or 911209 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 123012135 is about 11091.0835809672. The cubic root of 123012135 is about 497.3353377101.

Adding to 123012135 its reverse (531210321), we get a palindrome (654222456).

The spelling of 123012135 in words is "one hundred twenty-three million, twelve thousand, one hundred thirty-five".