7255999 has 2 divisors, whose sum is σ = 7256000. Its totient is φ = 7255998.

The previous prime is 7255993. The next prime is 7256023. The reversal of 7255999 is 9995527.

It is a weak prime.

It is an emirp because it is prime and its reverse (9995527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7255999 - 2⁹ = 7255487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7255993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3627999 + 3628000.

It is an arithmetic number, because the mean of its divisors is an integer number (3628000).

Almost surely, 2^7255999 is an apocalyptic number.

7255999 is a deficient number, since it is larger than the sum of its proper divisors (1).

7255999 is an equidigital number, since it uses as much as digits as its factorization.

7255999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 46.

The square root of 7255999 is about 2693.6961595547. The cubic root of 7255999 is about 193.5971998178.

It can be divided in two parts, 725 and 5999, that added together give a square (6724 = 82²).

The spelling of 7255999 in words is "seven million, two hundred fifty-five thousand, nine hundred ninety-nine".