1225278 has 12 divisors (see below), whose sum is σ = 2654808. Its totient is φ = 408420.

The previous prime is 1225261. The next prime is 1225283. The reversal of 1225278 is 8725221.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34018 + ... + 34053.

It is an arithmetic number, because the mean of its divisors is an integer number (221234).

2^1225278 is an apocalyptic number.

1225278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1225278 is an abundant number, since it is smaller than the sum of its proper divisors (1429530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225278 is a wasteful number, since it uses less digits than its factorization.

1225278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68079 (or 68076 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1225278 is about 1106.9227615331. The cubic root of 1225278 is about 107.0068414993.

The spelling of 1225278 in words is "one million, two hundred twenty-five thousand, two hundred seventy-eight".