1286825 has 6 divisors (see below), whose sum is σ = 1595694. Its totient is φ = 1029440.

The previous prime is 1286821. The next prime is 1286833. The reversal of 1286825 is 5286821.

1286825 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 3 ways, for example, as 3136 + 1283689 = 56^2 + 1133^2 .

It is not a de Polignac number, because 1286825 - 2² = 1286821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1286791 and 1286800.

It is not an unprimeable number, because it can be changed into a prime (1286821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25712 + ... + 25761.

It is an arithmetic number, because the mean of its divisors is an integer number (265949).

2^1286825 is an apocalyptic number.

It is an amenable number.

1286825 is a deficient number, since it is larger than the sum of its proper divisors (308869).

1286825 is an equidigital number, since it uses as much as digits as its factorization.

1286825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51483 (or 51478 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 1286825 is about 1134.3830922576. The cubic root of 1286825 is about 108.7693408152.

The spelling of 1286825 in words is "one million, two hundred eighty-six thousand, eight hundred twenty-five".