123985134 has 128 divisors (see below), whose sum is σ = 354170880. Its totient is φ = 31249152.

The previous prime is 123985129. The next prime is 123985139. The reversal of 123985134 is 431589321.

It is an interprime number because it is at equal distance from previous prime (123985129) and next prime (123985139).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123985139) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112474 + ... + 113570.

It is an arithmetic number, because the mean of its divisors is an integer number (2766960).

Almost surely, 2^123985134 is an apocalyptic number.

123985134 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 123985134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177085440).

123985134 is an abundant number, since it is smaller than the sum of its proper divisors (230185746).

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

123985134 is a wasteful number, since it uses less digits than its factorization.

123985134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1145 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 123985134 is about 11134.8612025476. The cubic root of 123985134 is about 498.6431666705.

The spelling of 123985134 in words is "one hundred twenty-three million, nine hundred eighty-five thousand, one hundred thirty-four".