12210775 has 12 divisors (see below), whose sum is σ = 15202152. Its totient is φ = 9729440.

The previous prime is 12210773. The next prime is 12210791. The reversal of 12210775 is 57701221.

It is a happy number.

It is not a de Polignac number, because 12210775 - 2¹ = 12210773 is a prime.

It is a super-2 number, since 2×12210775² = 298206052201250, which contains 22 as substring.

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

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210773) by changing a digit.

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, 6492 + ... + 8158.

It is an arithmetic number, because the mean of its divisors is an integer number (1266846).

Almost surely, 2^12210775 is an apocalyptic number.

12210775 is a deficient number, since it is larger than the sum of its proper divisors (2991377).

12210775 is a wasteful number, since it uses less digits than its factorization.

12210775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1965 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 12210775 is about 3494.3919356592. The cubic root of 12210775 is about 230.2755047644.

Adding to 12210775 its reverse (57701221), we get a palindrome (69911996).

The spelling of 12210775 in words is "twelve million, two hundred ten thousand, seven hundred seventy-five".