123013236 has 12 divisors (see below), whose sum is σ = 287030912. Its totient is φ = 41004408.

The previous prime is 123013217. The next prime is 123013237. The reversal of 123013236 is 632310321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013237) 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, 5125540 + ... + 5125563.

Almost surely, 2^123013236 is an apocalyptic number.

It is an amenable number.

123013236 is an abundant number, since it is smaller than the sum of its proper divisors (164017676).

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

123013236 is a wasteful number, since it uses less digits than its factorization.

123013236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251110 (or 10251108 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 123013236 is about 11091.1332153211. The cubic root of 123013236 is about 497.3368214785.

Adding to 123013236 its reverse (632310321), we get a palindrome (755323557).

The spelling of 123013236 in words is "one hundred twenty-three million, thirteen thousand, two hundred thirty-six".