1320405147 has 24 divisors (see below), whose sum is σ = 2021540976. Its totient is φ = 827629056.

The previous prime is 1320405143. The next prime is 1320405179. The reversal of 1320405147 is 7415040231.

It is not a de Polignac number, because 1320405147 - 2² = 1320405143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320405147.

It is not an unprimeable number, because it can be changed into a prime (1320405143) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 163908 + ... + 171774.

It is an arithmetic number, because the mean of its divisors is an integer number (84230874).

Almost surely, 2^1320405147 is an apocalyptic number.

1320405147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1320405147 is a deficient number, since it is larger than the sum of its proper divisors (701135829).

1320405147 is a wasteful number, since it uses less digits than its factorization.

1320405147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987 (or 8984 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1320405147 is about 36337.3794734843. The cubic root of 1320405147 is about 1097.0735289517.

Adding to 1320405147 its reverse (7415040231), we get a palindrome (8735445378).

The spelling of 1320405147 in words is "one billion, three hundred twenty million, four hundred five thousand, one hundred forty-seven".