1428257 has 2 divisors, whose sum is σ = 1428258. Its totient is φ = 1428256.

The previous prime is 1428253. The next prime is 1428281. The reversal of 1428257 is 7528241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844561 + 583696 = 919^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428257 - 2² = 1428253 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1428253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714128 + 714129.

It is an arithmetic number, because the mean of its divisors is an integer number (714129).

2^1428257 is an apocalyptic number.

It is an amenable number.

1428257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428257 is an equidigital number, since it uses as much as digits as its factorization.

1428257 is an evil number, because the sum of its binary digits is even.

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

The square root of 1428257 is about 1195.0970671874. The cubic root of 1428257 is about 112.6165245328.

The spelling of 1428257 in words is "one million, four hundred twenty-eight thousand, two hundred fifty-seven".