123855012 has 36 divisors (see below), whose sum is σ = 317373420. Its totient is φ = 40718592.

The previous prime is 123855001. The next prime is 123855019. The reversal of 123855012 is 210558321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 101727396 = 4704^2 + 10086^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (123855019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20937 + ... + 26192.

Almost surely, 2^123855012 is an apocalyptic number.

123855012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123855012 is an abundant number, since it is smaller than the sum of its proper divisors (193518408).

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

123855012 is a wasteful number, since it uses less digits than its factorization.

123855012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47212 (or 47207 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 123855012 is about 11129.0166681518. The cubic root of 123855012 is about 498.4686641423.

The spelling of 123855012 in words is "one hundred twenty-three million, eight hundred fifty-five thousand, twelve".