1213625466 has 24 divisors (see below), whose sum is σ = 2720196180. Its totient is φ = 390591936.

The previous prime is 1213625443. The next prime is 1213625467. The reversal of 1213625466 is 6645263121.

1213625466 is a `hidden beast` number, since 1 + 21 + 3 + 625 + 4 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1123925625 + 89699841 = 33525^2 + 9471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1213625466.

It is not an unprimeable number, because it can be changed into a prime (1213625467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161955 + ... + 1162998.

Almost surely, 2^1213625466 is an apocalyptic number.

1213625466 is an abundant number, since it is smaller than the sum of its proper divisors (1506570714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213625466 is a wasteful number, since it uses less digits than its factorization.

1213625466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324990 (or 2324987 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1213625466 is about 34837.1276944584. The cubic root of 1213625466 is about 1066.6654468519.

Adding to 1213625466 its reverse (6645263121), we get a palindrome (7858888587).

The spelling of 1213625466 in words is "one billion, two hundred thirteen million, six hundred twenty-five thousand, four hundred sixty-six".