12405665142 has 24 divisors (see below), whose sum is σ = 28946552544. Its totient is φ = 3817127664.

The previous prime is 12405665141. The next prime is 12405665143. The reversal of 12405665142 is 24156650421.

12405665142 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 566 + 51 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (12405665141) and next prime (12405665143).

It is a junction number, because it is equal to n+sod(n) for n = 12405665097 and 12405665106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405665141) 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, 26507598 + ... + 26508065.

It is an arithmetic number, because the mean of its divisors is an integer number (1206106356).

Almost surely, 2^12405665142 is an apocalyptic number.

12405665142 is an abundant number, since it is smaller than the sum of its proper divisors (16540887402).

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

12405665142 is a wasteful number, since it uses less digits than its factorization.

12405665142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53015684 (or 53015681 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 12405665142 in words is "twelve billion, four hundred five million, six hundred sixty-five thousand, one hundred forty-two".