1298514857 has 2 divisors, whose sum is σ = 1298514858. Its totient is φ = 1298514856.

The previous prime is 1298514851. The next prime is 1298514881. The reversal of 1298514857 is 7584158921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1284218896 + 14295961 = 35836^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298514857 - 2¹² = 1298510761 is a prime.

It is a super-2 number, since 2×1298514857² = 3372281667699460898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1298514851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649257428 + 649257429.

It is an arithmetic number, because the mean of its divisors is an integer number (649257429).

Almost surely, 2^1298514857 is an apocalyptic number.

It is an amenable number.

1298514857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298514857 is an equidigital number, since it uses as much as digits as its factorization.

1298514857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 50.

The square root of 1298514857 is about 36034.9116413514. The cubic root of 1298514857 is about 1090.9771158480.

The spelling of 1298514857 in words is "one billion, two hundred ninety-eight million, five hundred fourteen thousand, eight hundred fifty-seven".