1391230345 has 4 divisors (see below), whose sum is σ = 1669476420. Its totient is φ = 1112984272.

The previous prime is 1391230339. The next prime is 1391230361. The reversal of 1391230345 is 5430321931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 411602944 + 979627401 = 20288^2 + 31299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391230345 - 2¹¹ = 1391228297 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 139123030 + ... + 139123039.

It is an arithmetic number, because the mean of its divisors is an integer number (417369105).

Almost surely, 2^1391230345 is an apocalyptic number.

It is an amenable number.

1391230345 is a deficient number, since it is larger than the sum of its proper divisors (278246075).

1391230345 is an equidigital number, since it uses as much as digits as its factorization.

1391230345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278246074.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1391230345 is about 37299.2003265486. The cubic root of 1391230345 is about 1116.3482106181.

The spelling of 1391230345 in words is "one billion, three hundred ninety-one million, two hundred thirty thousand, three hundred forty-five".