12621775 has 6 divisors (see below), whose sum is σ = 15651032. Its totient is φ = 10097400.

The previous prime is 12621767. The next prime is 12621781. The reversal of 12621775 is 57712621.

It is not a de Polignac number, because 12621775 - 2³ = 12621767 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 252411 + ... + 252460.

Almost surely, 2^12621775 is an apocalyptic number.

12621775 is a deficient number, since it is larger than the sum of its proper divisors (3029257).

12621775 is an equidigital number, since it uses as much as digits as its factorization.

12621775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504881 (or 504876 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 12621775 is about 3552.7137514863. The cubic root of 12621775 is about 232.8306468296.

The spelling of 12621775 in words is "twelve million, six hundred twenty-one thousand, seven hundred seventy-five".