123434136 has 144 divisors (see below), whose sum is σ = 396138600. Its totient is φ = 34610688.

The previous prime is 123434119. The next prime is 123434153. The reversal of 123434136 is 631434321.

It is an interprime number because it is at equal distance from previous prime (123434119) and next prime (123434153).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 207856 + ... + 208448.

Almost surely, 2^123434136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123434136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198069300).

123434136 is an abundant number, since it is smaller than the sum of its proper divisors (272704464).

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

123434136 is a wasteful number, since it uses less digits than its factorization.

123434136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 664 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 123434136 is about 11110.0916287851. The cubic root of 123434136 is about 497.9034021765.

Adding to 123434136 its reverse (631434321), we get a palindrome (754868457).

The spelling of 123434136 in words is "one hundred twenty-three million, four hundred thirty-four thousand, one hundred thirty-six".