1320426851 has 2 divisors, whose sum is σ = 1320426852. Its totient is φ = 1320426850.

The previous prime is 1320426799. The next prime is 1320426857. The reversal of 1320426851 is 1586240231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320426851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320426857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660213425 + 660213426.

It is an arithmetic number, because the mean of its divisors is an integer number (660213426).

Almost surely, 2^1320426851 is an apocalyptic number.

1320426851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320426851 is an equidigital number, since it uses as much as digits as its factorization.

1320426851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1320426851 is about 36337.6781178985. The cubic root of 1320426851 is about 1097.0795399233.

The spelling of 1320426851 in words is "one billion, three hundred twenty million, four hundred twenty-six thousand, eight hundred fifty-one".