1203840 has 192 divisors, whose sum is σ = 4773600. Its totient is φ = 276480.

The previous prime is 1203827. The next prime is 1203841. The reversal of 1203840 is 483021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1203841) 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, 63351 + ... + 63369.

2^1203840 is an apocalyptic number.

1203840 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 1203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386800).

1203840 is an abundant number, since it is smaller than the sum of its proper divisors (3569760).

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

1203840 is a wasteful number, since it uses less digits than its factorization.

1203840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1203840 is about 1097.1964272636. The cubic root of 1203840 is about 106.3790864732.

Adding to 1203840 its reverse (483021), we get a palindrome (1686861).

It can be divided in two parts, 1 and 203840, that added together give a triangular number (203841 = T₆₃₈).

The spelling of 1203840 in words is "one million, two hundred three thousand, eight hundred forty".