1281506680 has 48 divisors (see below), whose sum is σ = 3043168920. Its totient is φ = 485618112.

The previous prime is 1281506659. The next prime is 1281506689. The reversal of 1281506680 is 866051821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281506689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29934 + ... + 58813.

Almost surely, 2^1281506680 is an apocalyptic number.

1281506680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1281506680 is an abundant number, since it is smaller than the sum of its proper divisors (1761662240).

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

1281506680 is a wasteful number, since it uses less digits than its factorization.

1281506680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88796 (or 88773 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 1281506680 is about 35798.1379404013. The cubic root of 1281506680 is about 1086.1928961282.

The spelling of 1281506680 in words is "one billion, two hundred eighty-one million, five hundred six thousand, six hundred eighty".