123435256 has 64 divisors (see below), whose sum is σ = 278470080. Its totient is φ = 50181120.

The previous prime is 123435253. The next prime is 123435259. The reversal of 123435256 is 652534321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123435253) and next prime (123435259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123435253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84226 + ... + 85678.

It is an arithmetic number, because the mean of its divisors is an integer number (4351095).

Almost surely, 2^123435256 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 123435256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139235040).

123435256 is an abundant number, since it is smaller than the sum of its proper divisors (155034824).

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

123435256 is a wasteful number, since it uses less digits than its factorization.

123435256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1540 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 123435256 is about 11110.1420332955. The cubic root of 123435256 is about 497.9049081082.

Adding to 123435256 its reverse (652534321), we get a palindrome (775969577).

The spelling of 123435256 in words is "one hundred twenty-three million, four hundred thirty-five thousand, two hundred fifty-six".