1213625166 has 24 divisors (see below), whose sum is σ = 2628326520. Its totient is φ = 373422816.

The previous prime is 1213625159. The next prime is 1213625167. The reversal of 1213625166 is 6615263121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213625167) 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, 597421 + ... + 599448.

It is an arithmetic number, because the mean of its divisors is an integer number (109513605).

Almost surely, 2^1213625166 is an apocalyptic number.

1213625166 is an abundant number, since it is smaller than the sum of its proper divisors (1414701354).

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

1213625166 is a wasteful number, since it uses less digits than its factorization.

1213625166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196900 (or 1196887 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 1213625166 is about 34837.1233887071. The cubic root of 1213625166 is about 1066.6653589611.

Adding to 1213625166 its reverse (6615263121), we get a palindrome (7828888287).

The spelling of 1213625166 in words is "one billion, two hundred thirteen million, six hundred twenty-five thousand, one hundred sixty-six".