1213412605 has 8 divisors (see below), whose sum is σ = 1462455000. Its totient is φ = 966490176.

The previous prime is 1213412579. The next prime is 1213412653. The reversal of 1213412605 is 5062143121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121638841 + 1091773764 = 11029^2 + 33042^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213412605 - 2⁹ = 1213412093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213412605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528730 + ... + 531019.

It is an arithmetic number, because the mean of its divisors is an integer number (182806875).

Almost surely, 2^1213412605 is an apocalyptic number.

It is an amenable number.

1213412605 is a deficient number, since it is larger than the sum of its proper divisors (249042395).

1213412605 is a wasteful number, since it uses less digits than its factorization.

1213412605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059983.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1213412605 is about 34834.0724722218. The cubic root of 1213412605 is about 1066.6030814419.

Adding to 1213412605 its reverse (5062143121), we get a palindrome (6275555726).

The spelling of 1213412605 in words is "one billion, two hundred thirteen million, four hundred twelve thousand, six hundred five".