12042730405 has 8 divisors (see below), whose sum is σ = 14452433784. Its totient is φ = 9633412800.

The previous prime is 12042730393. The next prime is 12042730433. The reversal of 12042730405 is 50403724021.

It can be written as a sum of positive squares in 4 ways, for example, as 568250244 + 11474480161 = 23838^2 + 107119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12042730405 - 2⁹ = 12042729893 is a prime.

It is a super-2 number, since 2×12042730405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22626 + ... + 156835.

It is an arithmetic number, because the mean of its divisors is an integer number (1806554223).

Almost surely, 2^12042730405 is an apocalyptic number.

It is an amenable number.

12042730405 is a deficient number, since it is larger than the sum of its proper divisors (2409703379).

12042730405 is a wasteful number, since it uses less digits than its factorization.

12042730405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192887.

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 12042730405 in words is "twelve billion, forty-two million, seven hundred thirty thousand, four hundred five".