1210240555 has 4 divisors (see below), whose sum is σ = 1452288672. Its totient is φ = 968192440.

The previous prime is 1210240469. The next prime is 1210240567. The reversal of 1210240555 is 5550420121.

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

It is not a de Polignac number, because 1210240555 - 2¹¹ = 1210238507 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 121024051 + ... + 121024060.

It is an arithmetic number, because the mean of its divisors is an integer number (363072168).

Almost surely, 2^1210240555 is an apocalyptic number.

1210240555 is a deficient number, since it is larger than the sum of its proper divisors (242048117).

1210240555 is an equidigital number, since it uses as much as digits as its factorization.

1210240555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242048116.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1210240555 is about 34788.5118250264. The cubic root of 1210240555 is about 1065.6728480506.

Adding to 1210240555 its reverse (5550420121), we get a palindrome (6760660676).

The spelling of 1210240555 in words is "one billion, two hundred ten million, two hundred forty thousand, five hundred fifty-five".