1256525 has 6 divisors (see below), whose sum is σ = 1558122. Its totient is φ = 1005200.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256525 is 5256521.

It can be written as a sum of positive squares in 3 ways, for example, as 8836 + 1247689 = 94^2 + 1117^2 .

It is not a de Polignac number, because 1256525 - 2¹² = 1252429 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1256494 and 1256503.

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, 25106 + ... + 25155.

It is an arithmetic number, because the mean of its divisors is an integer number (259687).

2^1256525 is an apocalyptic number.

It is an amenable number.

1256525 is a deficient number, since it is larger than the sum of its proper divisors (301597).

1256525 is an equidigital number, since it uses as much as digits as its factorization.

1256525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50271 (or 50266 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 1256525 is about 1120.9482592876. The cubic root of 1256525 is about 107.9088451238.

The spelling of 1256525 in words is "one million, two hundred fifty-six thousand, five hundred twenty-five".