1286298225 has 45 divisors (see below), whose sum is σ = 2385662257. Its totient is φ = 685164960.

The previous prime is 1286298199. The next prime is 1286298281. The reversal of 1286298225 is 5228926821.

The square root of 1286298225 is 35865.

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

1286298225 is a `hidden beast` number, since 12 + 8 + 629 + 8 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31438449 + 1254859776 = 5607^2 + 35424^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is a de Polignac number, because none of the positive numbers 2^k-1286298225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1613527 + ... + 1614323.

Almost surely, 2^1286298225 is an apocalyptic number.

1286298225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1286298225 is the 35865-th square number.

1286298225 is the 17933-rd centered octagonal number.

It is an amenable number.

1286298225 is a deficient number, since it is larger than the sum of its proper divisors (1099364032).

1286298225 is an frugal number, since it uses more digits than its factorization.

1286298225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 805 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The cubic root of 1286298225 is about 1087.5449684140.

The spelling of 1286298225 in words is "one billion, two hundred eighty-six million, two hundred ninety-eight thousand, two hundred twenty-five".