1278200 has 96 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 393600.

The previous prime is 1278197. The next prime is 1278203. The reversal of 1278200 is 28721.

1278200 = 214² + 215² + ... + 238².

It is an interprime number because it is at equal distance from previous prime (1278197) and next prime (1278203).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15359 + ... + 15441.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2^1278200 is an apocalyptic number.

1278200 is a gapful number since it is divisible by the number (10) 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 1278200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874880).

1278200 is an abundant number, since it is smaller than the sum of its proper divisors (2471560).

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

1278200 is a wasteful number, since it uses less digits than its factorization.

1278200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1278200 is about 1130.5750749066. The cubic root of 1278200 is about 108.5257854576.

The spelling of 1278200 in words is "one million, two hundred seventy-eight thousand, two hundred".