1266001212 has 48 divisors (see below), whose sum is σ = 3447843840. Its totient is φ = 354017472.

The previous prime is 1266001211. The next prime is 1266001283. The reversal of 1266001212 is 2121006621.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156387 + ... + 164282.

It is an arithmetic number, because the mean of its divisors is an integer number (71830080).

Almost surely, 2^1266001212 is an apocalyptic number.

1266001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266001212 is an abundant number, since it is smaller than the sum of its proper divisors (2181842628).

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

1266001212 is a wasteful number, since it uses less digits than its factorization.

1266001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320730 (or 320728 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1266001212 is about 35580.9107809230. The cubic root of 1266001212 is about 1081.7943456993.

Adding to 1266001212 its reverse (2121006621), we get a palindrome (3387007833).

The spelling of 1266001212 in words is "one billion, two hundred sixty-six million, one thousand, two hundred twelve".