1203720 has 64 divisors (see below), whose sum is σ = 4129920. Its totient is φ = 274944.

The previous prime is 1203691. The next prime is 1203731. The reversal of 1203720 is 273021.

1203720 = 43² + 44² + ... + 154².

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1203720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (64530).

2^1203720 is an apocalyptic number.

1203720 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 1203720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2064960).

1203720 is an abundant number, since it is smaller than the sum of its proper divisors (2926200).

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

1203720 is a wasteful number, since it uses less digits than its factorization.

1203720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 1203720 is about 1097.1417410709. The cubic root of 1203720 is about 106.3755516971.

Adding to 1203720 its reverse (273021), we get a palindrome (1476741).

The spelling of 1203720 in words is "one million, two hundred three thousand, seven hundred twenty".