12242555 has 32 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 8173440.

The previous prime is 12242539. The next prime is 12242557. The reversal of 12242555 is 55524221.

It is not a de Polignac number, because 12242555 - 2⁴ = 12242539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12242557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28190 + ... + 28620.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^12242555 is an apocalyptic number.

12242555 is a deficient number, since it is larger than the sum of its proper divisors (5175685).

12242555 is a wasteful number, since it uses less digits than its factorization.

12242555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 4000, while the sum is 26.

The square root of 12242555 is about 3498.9362669246. The cubic root of 12242555 is about 230.4751048693.

Adding to 12242555 its reverse (55524221), we get a palindrome (67766776).

The spelling of 12242555 in words is "twelve million, two hundred forty-two thousand, five hundred fifty-five".