1266132120 has 192 divisors, whose sum is σ = 4403116800. Its totient is φ = 288798720.

The previous prime is 1266132071. The next prime is 1266132121. The reversal of 1266132120 is 212316621.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266132121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379821 + ... + 383139.

It is an arithmetic number, because the mean of its divisors is an integer number (22932900).

Almost surely, 2^1266132120 is an apocalyptic number.

1266132120 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 1266132120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2201558400).

1266132120 is an abundant number, since it is smaller than the sum of its proper divisors (3136984680).

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

1266132120 is a wasteful number, since it uses less digits than its factorization.

1266132120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1266132120 is about 35582.7503152862. The cubic root of 1266132120 is about 1081.8316312490.

Adding to 1266132120 its reverse (212316621), we get a palindrome (1478448741).

It can be divided in two parts, 1266 and 132120, that added together give a triangular number (133386 = T₅₁₆).

The spelling of 1266132120 in words is "one billion, two hundred sixty-six million, one hundred thirty-two thousand, one hundred twenty".