1321839135 has 32 divisors (see below), whose sum is σ = 2404596480. Its totient is φ = 688582944.

The previous prime is 1321839109. The next prime is 1321839149. The reversal of 1321839135 is 5319381231.

It is not a de Polignac number, because 1321839135 - 2²³ = 1313450527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321839135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108049 + ... + 119658.

It is an arithmetic number, because the mean of its divisors is an integer number (75143640).

Almost surely, 2^1321839135 is an apocalyptic number.

1321839135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321839135 is a deficient number, since it is larger than the sum of its proper divisors (1082757345).

1321839135 is a wasteful number, since it uses less digits than its factorization.

1321839135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227764 (or 227758 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1321839135 is about 36357.1057016369. The cubic root of 1321839135 is about 1097.4705336429.

It can be divided in two parts, 1321 and 839135, that added together give a triangular number (840456 = T₁₂₉₆).

The spelling of 1321839135 in words is "one billion, three hundred twenty-one million, eight hundred thirty-nine thousand, one hundred thirty-five".