1256533 has 2 divisors, whose sum is σ = 1256534. Its totient is φ = 1256532.

The previous prime is 1256531. The next prime is 1256543. The reversal of 1256533 is 3356521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651249 + 605284 = 807^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256533 - 2¹ = 1256531 is a prime.

Together with 1256531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1256498 and 1256507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628266 + 628267.

It is an arithmetic number, because the mean of its divisors is an integer number (628267).

2^1256533 is an apocalyptic number.

It is an amenable number.

1256533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256533 is an equidigital number, since it uses as much as digits as its factorization.

1256533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 1256533 is about 1120.9518276893. The cubic root of 1256533 is about 107.9090741334.

The spelling of 1256533 in words is "one million, two hundred fifty-six thousand, five hundred thirty-three".