1255799 has 2 divisors, whose sum is σ = 1255800. Its totient is φ = 1255798.

The previous prime is 1255759. The next prime is 1255801. The reversal of 1255799 is 9975521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255799 - 2¹² = 1251703 is a prime.

It is a super-2 number, since 2×1255799² = 3154062256802, which contains 22 as substring.

Together with 1255801, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627899 + 627900.

It is an arithmetic number, because the mean of its divisors is an integer number (627900).

2^1255799 is an apocalyptic number.

1255799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255799 is an equidigital number, since it uses as much as digits as its factorization.

1255799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 1255799 is about 1120.6243795313. The cubic root of 1255799 is about 107.8880584530. Note that the first 3 decimals are identical.

The spelling of 1255799 in words is "one million, two hundred fifty-five thousand, seven hundred ninety-nine".