1225286 has 4 divisors (see below), whose sum is σ = 1837932. Its totient is φ = 612642.

The previous prime is 1225283. The next prime is 1225297. The reversal of 1225286 is 6825221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6825221 = 13 ⋅525017.

It is a d-powerful number, because it can be written as 1 + 2¹⁵ + 2¹⁶ + 5⁷ + 2²⁰ + 8² + 6³ .

It is a Curzon number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306320 + ... + 306323.

It is an arithmetic number, because the mean of its divisors is an integer number (459483).

2^1225286 is an apocalyptic number.

1225286 is a deficient number, since it is larger than the sum of its proper divisors (612646).

1225286 is an equidigital number, since it uses as much as digits as its factorization.

1225286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612645.

The product of its digits is 1920, while the sum is 26.

The square root of 1225286 is about 1106.9263751488. The cubic root of 1225286 is about 107.0070743860.

The spelling of 1225286 in words is "one million, two hundred twenty-five thousand, two hundred eighty-six".