1281668097 has 16 divisors (see below), whose sum is σ = 1812507840. Its totient is φ = 802808832.

The previous prime is 1281668093. The next prime is 1281668099. The reversal of 1281668097 is 7908661821.

It is not a de Polignac number, because 1281668097 - 2² = 1281668093 is a prime.

It is a super-2 number, since 2×1281668097² = 3285346221735202818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1281668093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9054 + ... + 51432.

It is an arithmetic number, because the mean of its divisors is an integer number (113281740).

Almost surely, 2^1281668097 is an apocalyptic number.

1281668097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1281668097 is a deficient number, since it is larger than the sum of its proper divisors (530839743).

1281668097 is a wasteful number, since it uses less digits than its factorization.

1281668097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42992.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 1281668097 is about 35800.3924140504. The cubic root of 1281668097 is about 1086.2384993858.

The spelling of 1281668097 in words is "one billion, two hundred eighty-one million, six hundred sixty-eight thousand, ninety-seven".