1225279 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 1022560.

The previous prime is 1225261. The next prime is 1225283. The reversal of 1225279 is 9725221.

It is not a de Polignac number, because 1225279 - 2⁹ = 1224767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7254 + ... + 7420.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1225279 is an apocalyptic number.

1225279 is a deficient number, since it is larger than the sum of its proper divisors (226241).

1225279 is a wasteful number, since it uses less digits than its factorization.

1225279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its digits is 2520, while the sum is 28.

The square root of 1225279 is about 1106.9232132357. The cubic root of 1225279 is about 107.0068706101.

The spelling of 1225279 in words is "one million, two hundred twenty-five thousand, two hundred seventy-nine".