1266381140 has 24 divisors (see below), whose sum is σ = 2668075872. Its totient is φ = 504900000.

The previous prime is 1266381101. The next prime is 1266381157. The reversal of 1266381140 is 411836621.

It is a junction number, because it is equal to n+sod(n) for n = 1266381097 and 1266381106.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 96986 + ... + 109265.

It is an arithmetic number, because the mean of its divisors is an integer number (111169828).

Almost surely, 2^1266381140 is an apocalyptic number.

1266381140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266381140 is an abundant number, since it is smaller than the sum of its proper divisors (1401694732).

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

1266381140 is a wasteful number, since it uses less digits than its factorization.

1266381140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206567 (or 206565 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1266381140 is about 35586.2493106537. The cubic root of 1266381140 is about 1081.9025506654.

The spelling of 1266381140 in words is "one billion, two hundred sixty-six million, three hundred eighty-one thousand, one hundred forty".