1320345451 has 2 divisors, whose sum is σ = 1320345452. Its totient is φ = 1320345450.

The previous prime is 1320345431. The next prime is 1320345469. The reversal of 1320345451 is 1545430231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320345451 - 2²¹ = 1318248299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320345421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660172725 + 660172726.

It is an arithmetic number, because the mean of its divisors is an integer number (660172726).

Almost surely, 2^1320345451 is an apocalyptic number.

1320345451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320345451 is an equidigital number, since it uses as much as digits as its factorization.

1320345451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1320345451 is about 36336.5580510868. The cubic root of 1320345451 is about 1097.0569956706.

Adding to 1320345451 its reverse (1545430231), we get a palindrome (2865775682).

The spelling of 1320345451 in words is "one billion, three hundred twenty million, three hundred forty-five thousand, four hundred fifty-one".