12242155 has 4 divisors (see below), whose sum is σ = 14690592. Its totient is φ = 9793720.

The previous prime is 12242123. The next prime is 12242161. The reversal of 12242155 is 55124221.

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

It is not a de Polignac number, because 12242155 - 2⁵ = 12242123 is a prime.

It is a Duffinian number.

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, 1224211 + ... + 1224220.

It is an arithmetic number, because the mean of its divisors is an integer number (3672648).

Almost surely, 2^12242155 is an apocalyptic number.

12242155 is a deficient number, since it is larger than the sum of its proper divisors (2448437).

12242155 is an equidigital number, since it uses as much as digits as its factorization.

12242155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448436.

The product of its digits is 800, while the sum is 22.

The square root of 12242155 is about 3498.8791062282. The cubic root of 12242155 is about 230.4725947439.

Adding to 12242155 its reverse (55124221), we get a palindrome (67366376).

The spelling of 12242155 in words is "twelve million, two hundred forty-two thousand, one hundred fifty-five".