1228772 has 12 divisors (see below), whose sum is σ = 2160060. Its totient is φ = 611616.

The previous prime is 1228763. The next prime is 1228783. The reversal of 1228772 is 2778221.

It can be written as a sum of positive squares in 2 ways, for example, as 92416 + 1136356 = 304^2 + 1066^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (180005).

2^1228772 is an apocalyptic number.

It is a pronic number, being equal to 1108×1109.

It is an amenable number.

1228772 is a deficient number, since it is larger than the sum of its proper divisors (931288).

1228772 is a wasteful number, since it uses less digits than its factorization.

1228772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1388 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 1228772 is about 1108.4998872350. The cubic root of 1228772 is about 107.1084584600.

The spelling of 1228772 in words is "one million, two hundred twenty-eight thousand, seven hundred seventy-two".