1266248540 has 24 divisors (see below), whose sum is σ = 2799076560. Its totient is φ = 479841408.

The previous prime is 1266248539. The next prime is 1266248561. The reversal of 1266248540 is 458426621.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1266248494 and 1266248503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1665737 + ... + 1666496.

It is an arithmetic number, because the mean of its divisors is an integer number (116628190).

Almost surely, 2^1266248540 is an apocalyptic number.

1266248540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266248540 is an abundant number, since it is smaller than the sum of its proper divisors (1532828020).

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

1266248540 is a wasteful number, since it uses less digits than its factorization.

1266248540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332261 (or 3332259 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1266248540 is about 35584.3861827066. The cubic root of 1266248540 is about 1081.8647881306.

The spelling of 1266248540 in words is "one billion, two hundred sixty-six million, two hundred forty-eight thousand, five hundred forty".