1321839145 has 8 divisors (see below), whose sum is σ = 1730407680. Its totient is φ = 961337520.

The previous prime is 1321839109. The next prime is 1321839149. The reversal of 1321839145 is 5419381231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321839145 - 2⁷ = 1321839017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321839149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12016665 + ... + 12016774.

It is an arithmetic number, because the mean of its divisors is an integer number (216300960).

Almost surely, 2^1321839145 is an apocalyptic number.

It is an amenable number.

1321839145 is a deficient number, since it is larger than the sum of its proper divisors (408568535).

1321839145 is a wasteful number, since it uses less digits than its factorization.

1321839145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24033455.

The product of its digits is 25920, while the sum is 37.

The square root of 1321839145 is about 36357.1058391616. The cubic root of 1321839145 is about 1097.4705364105.

The spelling of 1321839145 in words is "one billion, three hundred twenty-one million, eight hundred thirty-nine thousand, one hundred forty-five".