1266213000 has 128 divisors (see below), whose sum is σ = 4254606720. Its totient is φ = 311673600.

The previous prime is 1266212971. The next prime is 1266213031. The reversal of 1266213000 is 3126621.

It is a happy number.

It is a super-2 number, since 2×1266213000² = 3206590722738000000, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 22767 + ... + 55233.

It is an arithmetic number, because the mean of its divisors is an integer number (33239115).

Almost surely, 2^1266213000 is an apocalyptic number.

1266213000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127303360).

1266213000 is an abundant number, since it is smaller than the sum of its proper divisors (2988393720).

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

1266213000 is a wasteful number, since it uses less digits than its factorization.

1266213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32504 (or 32490 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1266213000 is about 35583.8868028775. The cubic root of 1266213000 is about 1081.8546664120.

Adding to 1266213000 its reverse (3126621), we get a palindrome (1269339621).

It can be divided in two parts, 126 and 6213000, that added together give a palindrome (6213126).

The spelling of 1266213000 in words is "one billion, two hundred sixty-six million, two hundred thirteen thousand".