123235136 has 28 divisors (see below), whose sum is σ = 245054628. Its totient is φ = 61489152.

The previous prime is 123235111. The next prime is 123235139. The reversal of 123235136 is 631532321.

It can be written as a sum of positive squares in 2 ways, for example, as 5382400 + 117852736 = 2320^2 + 10856^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123235139) 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, 33920 + ... + 37376.

It is an arithmetic number, because the mean of its divisors is an integer number (8751951).

Almost surely, 2^123235136 is an apocalyptic number.

123235136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123235136 is a deficient number, since it is larger than the sum of its proper divisors (121819492).

123235136 is an equidigital number, since it uses as much as digits as its factorization.

123235136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026 (or 4016 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 123235136 is about 11101.1321945106. The cubic root of 123235136 is about 497.6356856573.

Adding to 123235136 its reverse (631532321), we get a palindrome (754767457).

The spelling of 123235136 in words is "one hundred twenty-three million, two hundred thirty-five thousand, one hundred thirty-six".