1281012580 has 12 divisors (see below), whose sum is σ = 2690126460. Its totient is φ = 512405024.

The previous prime is 1281012559. The next prime is 1281012619. The reversal of 1281012580 is 852101821.

It can be written as a sum of positive squares in 2 ways, for example, as 164249856 + 1116762724 = 12816^2 + 33418^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32025295 + ... + 32025334.

It is an arithmetic number, because the mean of its divisors is an integer number (224177205).

Almost surely, 2^1281012580 is an apocalyptic number.

1281012580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1281012580 is an abundant number, since it is smaller than the sum of its proper divisors (1409113880).

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

1281012580 is a wasteful number, since it uses less digits than its factorization.

1281012580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64050638 (or 64050636 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 1281012580 is about 35791.2360781239. The cubic root of 1281012580 is about 1086.0532800267.

The spelling of 1281012580 in words is "one billion, two hundred eighty-one million, twelve thousand, five hundred eighty".