1228149 has 16 divisors (see below), whose sum is σ = 1960000. Its totient is φ = 755568.

The previous prime is 1228147. The next prime is 1228153. The reversal of 1228149 is 9418221.

It is not a de Polignac number, because 1228149 - 2¹ = 1228147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228147) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1399 + ... + 2100.

It is an arithmetic number, because the mean of its divisors is an integer number (122500).

2^1228149 is an apocalyptic number.

It is an amenable number.

1228149 is a deficient number, since it is larger than the sum of its proper divisors (731851).

1228149 is a wasteful number, since it uses less digits than its factorization.

1228149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3515 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1228149 is about 1108.2188412042. The cubic root of 1228149 is about 107.0903537044.

It can be divided in two parts, 1 and 228149, that added together give a triangular number (228150 = T₆₇₅).

The spelling of 1228149 in words is "one million, two hundred twenty-eight thousand, one hundred forty-nine".