1272252168 has 48 divisors (see below), whose sum is σ = 3758929200. Its totient is φ = 385530720.

The previous prime is 1272252167. The next prime is 1272252187. The reversal of 1272252168 is 8612522721.

It is a happy number.

1272252168 is a `hidden beast` number, since 1 + 2 + 72 + 2 + 521 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1272252167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802398 + ... + 803981.

It is an arithmetic number, because the mean of its divisors is an integer number (78311025).

Almost surely, 2^1272252168 is an apocalyptic number.

1272252168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1272252168 is an abundant number, since it is smaller than the sum of its proper divisors (2486677032).

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

1272252168 is a wasteful number, since it uses less digits than its factorization.

1272252168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606402 (or 1606395 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1272252168 is about 35668.6440448750. The cubic root of 1272252168 is about 1083.5718978726.

Adding to 1272252168 its reverse (8612522721), we get a palindrome (9884774889).

The spelling of 1272252168 in words is "one billion, two hundred seventy-two million, two hundred fifty-two thousand, one hundred sixty-eight".