12145541305 has 32 divisors (see below), whose sum is σ = 15194833920. Its totient is φ = 9309634560.

The previous prime is 12145541297. The next prime is 12145541357. The reversal of 12145541305 is 50314554121.

It is not a de Polignac number, because 12145541305 - 2³ = 12145541297 is a prime.

It is a super-2 number, since 2×12145541305² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12430977 + ... + 12431953.

It is an arithmetic number, because the mean of its divisors is an integer number (474838560).

Almost surely, 2^12145541305 is an apocalyptic number.

It is an amenable number.

12145541305 is a deficient number, since it is larger than the sum of its proper divisors (3049292615).

12145541305 is a wasteful number, since it uses less digits than its factorization.

12145541305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 12145541305 in words is "twelve billion, one hundred forty-five million, five hundred forty-one thousand, three hundred five".