1217944 has 48 divisors (see below), whose sum is σ = 2872800. Its totient is φ = 479808.

The previous prime is 1217941. The next prime is 1217947. The reversal of 1217944 is 4497121.

It is an interprime number because it is at equal distance from previous prime (1217941) and next prime (1217947).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4977 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (59850).

2^1217944 is an apocalyptic number.

1217944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436400).

1217944 is an abundant number, since it is smaller than the sum of its proper divisors (1654856).

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

1217944 is a wasteful number, since it uses less digits than its factorization.

1217944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 261 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1217944 is about 1103.6050018009. The cubic root of 1217944 is about 106.7929147530.

It can be divided in two parts, 12 and 17944, that added together give a square (17956 = 134²).

The spelling of 1217944 in words is "one million, two hundred seventeen thousand, nine hundred forty-four".