1255829 has 2 divisors, whose sum is σ = 1255830. Its totient is φ = 1255828.

The previous prime is 1255811. The next prime is 1255831. The reversal of 1255829 is 9285521.

1255829 = 646² + 647² + 648².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 442225 = 902^2 + 665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255829 is a prime.

It is a Sophie Germain prime.

Together with 1255831, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1255795 and 1255804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627914 + 627915.

It is an arithmetic number, because the mean of its divisors is an integer number (627915).

2^1255829 is an apocalyptic number.

It is an amenable number.

1255829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255829 is an equidigital number, since it uses as much as digits as its factorization.

1255829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 1255829 is about 1120.6377648464. The cubic root of 1255829 is about 107.8889175650. Note that the first 3 decimals are identical.

The spelling of 1255829 in words is "one million, two hundred fifty-five thousand, eight hundred twenty-nine".