1428818157257 has 2 divisors, whose sum is σ = 1428818157258. Its totient is φ = 1428818157256.

The previous prime is 1428818157233. The next prime is 1428818157287. The reversal of 1428818157257 is 7527518188241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905306578576 + 523511578681 = 951476^2 + 723541^2 .

It is an emirp because it is prime and its reverse (7527518188241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428818157257 - 2⁸ = 1428818157001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1428818157196 and 1428818157205.

It is not a weakly prime, because it can be changed into another prime (1428818157287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714409078628 + 714409078629.

It is an arithmetic number, because the mean of its divisors is an integer number (714409078629).

Almost surely, 2^{1428818157257} is an apocalyptic number.

It is an amenable number.

1428818157257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428818157257 is an equidigital number, since it uses as much as digits as its factorization.

1428818157257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10035200, while the sum is 59.

The spelling of 1428818157257 in words is "one trillion, four hundred twenty-eight billion, eight hundred eighteen million, one hundred fifty-seven thousand, two hundred fifty-seven".