12640075 has 12 divisors (see below), whose sum is σ = 17913040. Its totient is φ = 8667360.

The previous prime is 12640037. The next prime is 12640091. The reversal of 12640075 is 57004621.

It is not a de Polignac number, because 12640075 - 2⁷ = 12639947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35940 + ... + 36289.

Almost surely, 2^12640075 is an apocalyptic number.

12640075 is a deficient number, since it is larger than the sum of its proper divisors (5272965).

12640075 is an equidigital number, since it uses as much as digits as its factorization.

12640075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72246 (or 72241 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 12640075 is about 3555.2883146097. The cubic root of 12640075 is about 232.9431176266.

Adding to 12640075 its reverse (57004621), we get a palindrome (69644696).

The spelling of 12640075 in words is "twelve million, six hundred forty thousand, seventy-five".