1428321407 has 2 divisors, whose sum is σ = 1428321408. Its totient is φ = 1428321406.

The previous prime is 1428321361. The next prime is 1428321421. The reversal of 1428321407 is 7041238241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428321407 - 2¹⁸ = 1428059263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428321437) 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 as a sum of consecutive naturals, namely, 714160703 + 714160704.

It is an arithmetic number, because the mean of its divisors is an integer number (714160704).

Almost surely, 2^1428321407 is an apocalyptic number.

1428321407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428321407 is an equidigital number, since it uses as much as digits as its factorization.

1428321407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 1428321407 is about 37793.1396816936. The cubic root of 1428321407 is about 1126.1821731484.

Adding to 1428321407 its reverse (7041238241), we get a palindrome (8469559648).

The spelling of 1428321407 in words is "one billion, four hundred twenty-eight million, three hundred twenty-one thousand, four hundred seven".