1228172 has 24 divisors (see below), whose sum is σ = 2376192. Its totient is φ = 550800.

The previous prime is 1228163. The next prime is 1228181. The reversal of 1228172 is 2718221.

It is an interprime number because it is at equal distance from previous prime (1228163) and next prime (1228181).

It is a super-3 number, since 3×1228172³ = 5557747742209633344, which contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4397 + ... + 4667.

It is an arithmetic number, because the mean of its divisors is an integer number (99008).

2^1228172 is an apocalyptic number.

It is an amenable number.

1228172 is a deficient number, since it is larger than the sum of its proper divisors (1148020).

1228172 is a wasteful number, since it uses less digits than its factorization.

1228172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

The product of its digits is 448, while the sum is 23.

The square root of 1228172 is about 1108.2292181674. The cubic root of 1228172 is about 107.0910222071.

The spelling of 1228172 in words is "one million, two hundred twenty-eight thousand, one hundred seventy-two".