1210240505 has 4 divisors (see below), whose sum is σ = 1452288612. Its totient is φ = 968192400.

The previous prime is 1210240469. The next prime is 1210240567. The reversal of 1210240505 is 5050420121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5050420121 = 863 ⋅5852167.

It can be written as a sum of positive squares in 2 ways, for example, as 804459769 + 405780736 = 28363^2 + 20144^2 .

It is not a de Polignac number, because 1210240505 - 2¹⁸ = 1209978361 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, 121024046 + ... + 121024055.

It is an arithmetic number, because the mean of its divisors is an integer number (363072153).

Almost surely, 2^1210240505 is an apocalyptic number.

It is an amenable number.

1210240505 is a deficient number, since it is larger than the sum of its proper divisors (242048107).

1210240505 is an equidigital number, since it uses as much as digits as its factorization.

1210240505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242048106.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1210240505 is about 34788.5111063983. The cubic root of 1210240505 is about 1065.6728333748.

Adding to 1210240505 its reverse (5050420121), we get a palindrome (6260660626).

The spelling of 1210240505 in words is "one billion, two hundred ten million, two hundred forty thousand, five hundred five".