279225 has 36 divisors (see below), whose sum is σ = 536796. Its totient is φ = 138240.

The previous prime is 279221. The next prime is 279269. The reversal of 279225 is 522972.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 441 + 278784 = 21^2 + 528^2 .

It is not a de Polignac number, because 279225 - 2² = 279221 is a prime.

It is a d-powerful number, because it can be written as 2² + 7⁵ + 2⁸ + 9 + 2¹⁸ + 5 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3789 + ... + 3861.

It is an arithmetic number, because the mean of its divisors is an integer number (14911).

2²⁷⁹²²⁵ is an apocalyptic number.

279225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

279225 is a deficient number, since it is larger than the sum of its proper divisors (257571).

279225 is a wasteful number, since it uses less digits than its factorization.

279225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 98 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 279225 is about 528.4174486143. The cubic root of 279225 is about 65.3609114680.

The spelling of 279225 in words is "two hundred seventy-nine thousand, two hundred twenty-five".