1212606505 has 32 divisors (see below), whose sum is σ = 1687651200. Its totient is φ = 827136000.

The previous prime is 1212606487. The next prime is 1212606553. The reversal of 1212606505 is 5056062121.

It is not a de Polignac number, because 1212606505 - 2¹³ = 1212598313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99801 + ... + 111289.

It is an arithmetic number, because the mean of its divisors is an integer number (52739100).

Almost surely, 2^1212606505 is an apocalyptic number.

It is an amenable number.

1212606505 is a deficient number, since it is larger than the sum of its proper divisors (475044695).

1212606505 is a wasteful number, since it uses less digits than its factorization.

1212606505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11625.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1212606505 is about 34822.4999820518. The cubic root of 1212606505 is about 1066.3668388526.

Adding to 1212606505 its reverse (5056062121), we get a palindrome (6268668626).

It can be divided in two parts, 121260 and 6505, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 1212606505 in words is "one billion, two hundred twelve million, six hundred six thousand, five hundred five".