1210135505 has 16 divisors (see below), whose sum is σ = 1497016080. Its totient is φ = 938403072.

The previous prime is 1210135457. The next prime is 1210135523. The reversal of 1210135505 is 5055310121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 208849 + 1209926656 = 457^2 + 34784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210135505 - 2⁸ = 1210135249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37607 + ... + 61923.

It is an arithmetic number, because the mean of its divisors is an integer number (93563505).

Almost surely, 2^1210135505 is an apocalyptic number.

It is an amenable number.

1210135505 is a deficient number, since it is larger than the sum of its proper divisors (286880575).

1210135505 is a wasteful number, since it uses less digits than its factorization.

1210135505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24628.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1210135505 is about 34787.0019547532. The cubic root of 1210135505 is about 1065.6420133620.

Adding to 1210135505 its reverse (5055310121), we get a palindrome (6265445626).

The spelling of 1210135505 in words is "one billion, two hundred ten million, one hundred thirty-five thousand, five hundred five".