1081200 has 120 divisors (see below), whose sum is σ = 3736368. Its totient is φ = 266240.

The previous prime is 1081163. The next prime is 1081219. The reversal of 1081200 is 21801.

1081200 = T₂₃₅ + T₂₃₆ + ... + T₂₆₈.

It is a happy number.

1081200 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 23 ways as a sum of consecutive naturals, for example, 20374 + ... + 20426.

2^1081200 is an apocalyptic number.

1081200 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 1081200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868184).

1081200 is an abundant number, since it is smaller than the sum of its proper divisors (2655168).

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

1081200 is a wasteful number, since it uses less digits than its factorization.

1081200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1081200 is about 1039.8076745245. The cubic root of 1081200 is about 102.6365422009.

1081200 divided by its sum of digits (12) gives a triangular number (90100 = T₄₂₄).

It can be divided in two parts, 108 and 1200, that multiplied together give a square (129600 = 360²).

The spelling of 1081200 in words is "one million, eighty-one thousand, two hundred".