1428000257 has 4 divisors (see below), whose sum is σ = 1428173760. Its totient is φ = 1427826756.

The previous prime is 1428000247. The next prime is 1428000269. The reversal of 1428000257 is 7520008241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1428000257 - 2¹⁰ = 1427999233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428000227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73757 + ... + 91082.

It is an arithmetic number, because the mean of its divisors is an integer number (357043440).

Almost surely, 2^1428000257 is an apocalyptic number.

It is an amenable number.

1428000257 is a deficient number, since it is larger than the sum of its proper divisors (173503).

1428000257 is an equidigital number, since it uses as much as digits as its factorization.

1428000257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173502.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1428000257 is about 37788.8906558528. The cubic root of 1428000257 is about 1126.0977615883.

Adding to 1428000257 its reverse (7520008241), we get a palindrome (8948008498).

The spelling of 1428000257 in words is "one billion, four hundred twenty-eight million, two hundred fifty-seven", and thus it is an aban number.