1286525 has 6 divisors (see below), whose sum is σ = 1595322. Its totient is φ = 1029200.

The previous prime is 1286521. The next prime is 1286533. The reversal of 1286525 is 5256821.

It can be written as a sum of positive squares in 3 ways, for example, as 56644 + 1229881 = 238^2 + 1109^2 .

It is not a de Polignac number, because 1286525 - 2² = 1286521 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286521) 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, 25706 + ... + 25755.

It is an arithmetic number, because the mean of its divisors is an integer number (265887).

2^1286525 is an apocalyptic number.

It is an amenable number.

1286525 is a deficient number, since it is larger than the sum of its proper divisors (308797).

1286525 is an equidigital number, since it uses as much as digits as its factorization.

1286525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51471 (or 51466 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 1286525 is about 1134.2508540883. The cubic root of 1286525 is about 108.7608876227.

The spelling of 1286525 in words is "one million, two hundred eighty-six thousand, five hundred twenty-five".