12145727 has 4 divisors (see below), whose sum is σ = 13249896. Its totient is φ = 11041560.

The previous prime is 12145723. The next prime is 12145733. The reversal of 12145727 is 72754121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12145727 - 2² = 12145723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12145727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145723) 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, 552068 + ... + 552089.

It is an arithmetic number, because the mean of its divisors is an integer number (3312474).

Almost surely, 2^12145727 is an apocalyptic number.

12145727 is a deficient number, since it is larger than the sum of its proper divisors (1104169).

12145727 is a wasteful number, since it uses less digits than its factorization.

12145727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104168.

The product of its digits is 3920, while the sum is 29.

The square root of 12145727 is about 3485.0720222113. The cubic root of 12145727 is about 229.8658764330.

Adding to 12145727 its reverse (72754121), we get a palindrome (84899848).

The spelling of 12145727 in words is "twelve million, one hundred forty-five thousand, seven hundred twenty-seven".