1266126620 has 48 divisors (see below), whose sum is σ = 2903040000. Its totient is φ = 460019520.

The previous prime is 1266126611. The next prime is 1266126647. The reversal of 1266126620 is 266216621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438341 + ... + 441219.

It is an arithmetic number, because the mean of its divisors is an integer number (60480000).

Almost surely, 2^1266126620 is an apocalyptic number.

1266126620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266126620 is an abundant number, since it is smaller than the sum of its proper divisors (1636913380).

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

1266126620 is a wasteful number, since it uses less digits than its factorization.

1266126620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898 (or 4896 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1266126620 is about 35582.6730305636. The cubic root of 1266126620 is about 1081.8300647767.

Subtracting from 1266126620 its reverse (266216621), we obtain a palindrome (999909999).

The spelling of 1266126620 in words is "one billion, two hundred sixty-six million, one hundred twenty-six thousand, six hundred twenty".