1210020605 has 16 divisors (see below), whose sum is σ = 1529305920. Its totient is φ = 916553088.

The previous prime is 1210020589. The next prime is 1210020607. The reversal of 1210020605 is 5060200121.

It is a cyclic number.

It is not a de Polignac number, because 1210020605 - 2⁴ = 1210020589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210020607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313769 + ... + 317601.

It is an arithmetic number, because the mean of its divisors is an integer number (95581620).

Almost surely, 2^1210020605 is an apocalyptic number.

It is an amenable number.

1210020605 is a deficient number, since it is larger than the sum of its proper divisors (319285315).

1210020605 is a wasteful number, since it uses less digits than its factorization.

1210020605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1210020605 is about 34785.3504366421. The cubic root of 1210020605 is about 1065.6082854194.

Adding to 1210020605 its reverse (5060200121), we get a palindrome (6270220726).

The spelling of 1210020605 in words is "one billion, two hundred ten million, twenty thousand, six hundred five".