1281461530 has 16 divisors (see below), whose sum is σ = 2442315240. Its totient is φ = 482432512.

The previous prime is 1281461473. The next prime is 1281461549. The reversal of 1281461530 is 351641821.

It can be written as a sum of positive squares in 4 ways, for example, as 1029318889 + 252142641 = 32083^2 + 15879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1281461492 and 1281461501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3768835 + ... + 3769174.

Almost surely, 2^1281461530 is an apocalyptic number.

1281461530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1281461530 is a deficient number, since it is larger than the sum of its proper divisors (1160853710).

1281461530 is a wasteful number, since it uses less digits than its factorization.

1281461530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7538033.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1281461530 is about 35797.5073154542. The cubic root of 1281461530 is about 1086.1801397413.

The spelling of 1281461530 in words is "one billion, two hundred eighty-one million, four hundred sixty-one thousand, five hundred thirty".