1210240345 has 4 divisors (see below), whose sum is σ = 1452288420. Its totient is φ = 968192272.

The previous prime is 1210240303. The next prime is 1210240349. The reversal of 1210240345 is 5430420121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 424895769 + 785344576 = 20613^2 + 28024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210240345 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1210240349) 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 3 ways as a sum of consecutive naturals, for example, 121024030 + ... + 121024039.

It is an arithmetic number, because the mean of its divisors is an integer number (363072105).

Almost surely, 2^1210240345 is an apocalyptic number.

It is an amenable number.

1210240345 is a deficient number, since it is larger than the sum of its proper divisors (242048075).

1210240345 is an equidigital number, since it uses as much as digits as its factorization.

1210240345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242048074.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1210240345 is about 34788.5088067885. The cubic root of 1210240345 is about 1065.6727864124.

Adding to 1210240345 its reverse (5430420121), we get a palindrome (6640660466).

The spelling of 1210240345 in words is "one billion, two hundred ten million, two hundred forty thousand, three hundred forty-five".