1203820 has 24 divisors (see below), whose sum is σ = 2638944. Its totient is φ = 460416.

The previous prime is 1203817. The next prime is 1203827. The reversal of 1203820 is 283021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1203794 and 1203803.

It is not an unprimeable number, because it can be changed into a prime (1203827) 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 7 ways as a sum of consecutive naturals, for example, 849 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (109956).

2^1203820 is an apocalyptic number.

1203820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203820 is an abundant number, since it is smaller than the sum of its proper divisors (1435124).

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

1203820 is a wasteful number, since it uses less digits than its factorization.

1203820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649 (or 2647 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1203820 is about 1097.1873130874. The cubic root of 1203820 is about 106.3784973602.

Adding to 1203820 its reverse (283021), we get a palindrome (1486841).

The spelling of 1203820 in words is "one million, two hundred three thousand, eight hundred twenty".