1428717457 has 2 divisors, whose sum is σ = 1428717458. Its totient is φ = 1428717456.

The previous prime is 1428717443. The next prime is 1428717467. The reversal of 1428717457 is 7547178241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024064001 + 404653456 = 32001^2 + 20116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428717457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428717467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714358728 + 714358729.

It is an arithmetic number, because the mean of its divisors is an integer number (714358729).

Almost surely, 2^1428717457 is an apocalyptic number.

It is an amenable number.

1428717457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428717457 is an equidigital number, since it uses as much as digits as its factorization.

1428717457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 46.

The square root of 1428717457 is about 37798.3790260905. The cubic root of 1428717457 is about 1126.2862541180.

The spelling of 1428717457 in words is "one billion, four hundred twenty-eight million, seven hundred seventeen thousand, four hundred fifty-seven".