1212275872 has 12 divisors (see below), whose sum is σ = 2386668186. Its totient is φ = 606137920.

The previous prime is 1212275861. The next prime is 1212275921. The reversal of 1212275872 is 2785722121.

It can be written as a sum of positive squares in only one way, i.e., 1166632336 + 45643536 = 34156^2 + 6756^2 .

It is a super-2 number, since 2×1212275872² = 2939225579666720768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18941779 + ... + 18941842.

Almost surely, 2^1212275872 is an apocalyptic number.

It is an amenable number.

1212275872 is a deficient number, since it is larger than the sum of its proper divisors (1174392314).

1212275872 is an equidigital number, since it uses as much as digits as its factorization.

1212275872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37883631 (or 37883623 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 1212275872 is about 34817.7522536995. The cubic root of 1212275872 is about 1066.2699104274.

Adding to 1212275872 its reverse (2785722121), we get a palindrome (3997997993).

The spelling of 1212275872 in words is "one billion, two hundred twelve million, two hundred seventy-five thousand, eight hundred seventy-two".