1298950281225 has 405 divisors, whose sum is σ = 2686407568119. Its totient is φ = 620369668800.

The previous prime is 1298950281157. The next prime is 1298950281247. The reversal of 1298950281225 is 5221820598921.

The square root of 1298950281225 is 1139715.

It is a perfect power (a square), and thus also a powerful number.

1298950281225 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 9 + 502 + 8 + 122 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 467622101241 + 831328179984 = 683829^2 + 911772^2 .

It is a tau number, because it is divible by the number of its divisors (405).

It is not a de Polignac number, because 1298950281225 - 2⁹ = 1298950280713 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 404 ways as a sum of consecutive naturals, for example, 30208146054 + ... + 30208146096.

Almost surely, 2^{1298950281225} is an apocalyptic number.

1298950281225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1298950281225 is the 1139715-th square number.

1298950281225 is the 569858-th centered octagonal number.

It is an amenable number.

1298950281225 is an abundant number, since it is smaller than the sum of its proper divisors (1387457286894).

1298950281225 is an equidigital number, since it uses as much as digits as its factorization.

1298950281225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 1298950281225 in words is "one trillion, two hundred ninety-eight billion, nine hundred fifty million, two hundred eighty-one thousand, two hundred twenty-five".