1230781321 has 8 divisors (see below), whose sum is σ = 1534480704. Its totient is φ = 959050320.

The previous prime is 1230781309. The next prime is 1230781333. The reversal of 1230781321 is 1231870321.

It is an interprime number because it is at equal distance from previous prime (1230781309) and next prime (1230781333).

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

It is a cyclic number.

It is not a de Polignac number, because 1230781321 - 2¹⁵ = 1230748553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230781321.

It is not an unprimeable number, because it can be changed into a prime (1230781361) 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, 7992010 + ... + 7992163.

It is an arithmetic number, because the mean of its divisors is an integer number (191810088).

Almost surely, 2^1230781321 is an apocalyptic number.

1230781321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1230781321 is a deficient number, since it is larger than the sum of its proper divisors (303699383).

1230781321 is a wasteful number, since it uses less digits than its factorization.

1230781321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15984191.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1230781321 is about 35082.4930841581. The cubic root of 1230781321 is about 1071.6680887614.

The spelling of 1230781321 in words is "one billion, two hundred thirty million, seven hundred eighty-one thousand, three hundred twenty-one".