12477145 has 4 divisors (see below), whose sum is σ = 14972580. Its totient is φ = 9981712.

The previous prime is 12477139. The next prime is 12477151. The reversal of 12477145 is 54177421.

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

It is an interprime number because it is at equal distance from previous prime (12477139) and next prime (12477151).

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 10575504 = 1379^2 + 3252^2 .

It is a cyclic number.

It is not a de Polignac number, because 12477145 - 2¹¹ = 12475097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247710 + ... + 1247719.

It is an arithmetic number, because the mean of its divisors is an integer number (3743145).

Almost surely, 2^12477145 is an apocalyptic number.

It is an amenable number.

12477145 is a deficient number, since it is larger than the sum of its proper divisors (2495435).

12477145 is an equidigital number, since it uses as much as digits as its factorization.

12477145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495434.

The product of its digits is 7840, while the sum is 31.

The square root of 12477145 is about 3532.3002420519. The cubic root of 12477145 is about 231.9379107034.

The spelling of 12477145 in words is "twelve million, four hundred seventy-seven thousand, one hundred forty-five".