1227945 has 16 divisors (see below), whose sum is σ = 1994112. Its totient is φ = 645120.

The previous prime is 1227943. The next prime is 1227949. The reversal of 1227945 is 5497221.

It is not a de Polignac number, because 1227945 - 2¹ = 1227943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1227943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 489 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (124632).

2^1227945 is an apocalyptic number.

1227945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1227945 is a deficient number, since it is larger than the sum of its proper divisors (766167).

1227945 is a wasteful number, since it uses less digits than its factorization.

1227945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 5040, while the sum is 30.

The square root of 1227945 is about 1108.1267977989. The cubic root of 1227945 is about 107.0844240108.

The spelling of 1227945 in words is "one million, two hundred twenty-seven thousand, nine hundred forty-five".