1210625005 has 4 divisors (see below), whose sum is σ = 1452750012. Its totient is φ = 968500000.

The previous prime is 1210624997. The next prime is 1210625011. The reversal of 1210625005 is 5005260121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5005260121 = 2593 ⋅1930297.

It can be written as a sum of positive squares in 2 ways, for example, as 770506564 + 440118441 = 27758^2 + 20979^2 .

It is not a de Polignac number, because 1210625005 - 2³ = 1210624997 is a prime.

It is a super-2 number, since 2×1210625005² = 2931225805462500050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent 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, 121062496 + ... + 121062505.

It is an arithmetic number, because the mean of its divisors is an integer number (363187503).

Almost surely, 2^1210625005 is an apocalyptic number.

It is an amenable number.

1210625005 is a deficient number, since it is larger than the sum of its proper divisors (242125007).

1210625005 is an equidigital number, since it uses as much as digits as its factorization.

1210625005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242125006.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1210625005 is about 34794.0369172650. The cubic root of 1210625005 is about 1065.7856781130.

Adding to 1210625005 its reverse (5005260121), we get a palindrome (6215885126).

The spelling of 1210625005 in words is "one billion, two hundred ten million, six hundred twenty-five thousand, five".