12270551 has 2 divisors, whose sum is σ = 12270552. Its totient is φ = 12270550.

The previous prime is 12270541. The next prime is 12270553. The reversal of 12270551 is 15507221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12270551 - 2⁶ = 12270487 is a prime.

Together with 12270553, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12270553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135275 + 6135276.

It is an arithmetic number, because the mean of its divisors is an integer number (6135276).

Almost surely, 2^12270551 is an apocalyptic number.

12270551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12270551 is an equidigital number, since it uses as much as digits as its factorization.

12270551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12270551 is about 3502.9346268522. The cubic root of 12270551 is about 230.6506528898.

Adding to 12270551 its reverse (15507221), we get a palindrome (27777772).

It can be divided in two parts, 12270 and 551, that added together give a palindrome (12821).

The spelling of 12270551 in words is "twelve million, two hundred seventy thousand, five hundred fifty-one".