1206620505 has 96 divisors (see below), whose sum is σ = 2227979520. Its totient is φ = 603348480.

The previous prime is 1206620501. The next prime is 1206620507. The reversal of 1206620505 is 5050266021.

It is not a de Polignac number, because 1206620505 - 2² = 1206620501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1206620501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6974599 + ... + 6974771.

It is an arithmetic number, because the mean of its divisors is an integer number (23208120).

Almost surely, 2^1206620505 is an apocalyptic number.

1206620505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206620505 is a deficient number, since it is larger than the sum of its proper divisors (1021359015).

1206620505 is a wasteful number, since it uses less digits than its factorization.

1206620505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1206620505 is about 34736.4434707988. The cubic root of 1206620505 is about 1064.6092463195.

Adding to 1206620505 its reverse (5050266021), we get a palindrome (6256886526).

The spelling of 1206620505 in words is "one billion, two hundred six million, six hundred twenty thousand, five hundred five".