1285525 has 6 divisors (see below), whose sum is σ = 1594082. Its totient is φ = 1028400.

The previous prime is 1285519. The next prime is 1285547. The reversal of 1285525 is 5255821.

It can be written as a sum of positive squares in 3 ways, for example, as 116964 + 1168561 = 342^2 + 1081^2 .

It is not a de Polignac number, because 1285525 - 2³ = 1285517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1285493 and 1285502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25686 + ... + 25735.

2^1285525 is an apocalyptic number.

It is an amenable number.

1285525 is a deficient number, since it is larger than the sum of its proper divisors (308557).

1285525 is an equidigital number, since it uses as much as digits as its factorization.

1285525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51431 (or 51426 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 1285525 is about 1133.8099488009. The cubic root of 1285525 is about 108.7327008199.

It can be divided in two parts, 12855 and 25, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 1285525 in words is "one million, two hundred eighty-five thousand, five hundred twenty-five".