1321678834 has 16 divisors (see below), whose sum is σ = 2270476800. Its totient is φ = 565248384.

The previous prime is 1321678823. The next prime is 1321678837. The reversal of 1321678834 is 4388761231.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1321678837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91839 + ... + 105250.

It is an arithmetic number, because the mean of its divisors is an integer number (141904800).

Almost surely, 2^1321678834 is an apocalyptic number.

1321678834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1321678834 is a deficient number, since it is larger than the sum of its proper divisors (948797966).

1321678834 is a wasteful number, since it uses less digits than its factorization.

1321678834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197577.

The product of its digits is 193536, while the sum is 43.

The square root of 1321678834 is about 36354.9011001268. The cubic root of 1321678834 is about 1097.4261679983.

The spelling of 1321678834 in words is "one billion, three hundred twenty-one million, six hundred seventy-eight thousand, eight hundred thirty-four".