1203990 has 32 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 315744.

The previous prime is 1203971. The next prime is 1204003. The reversal of 1203990 is 993021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203990.

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 15 ways as a sum of consecutive naturals, for example, 1711 + ... + 2309.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2^1203990 is an apocalyptic number.

1203990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1203990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468800).

1203990 is an abundant number, since it is smaller than the sum of its proper divisors (1733610).

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

1203990 is a wasteful number, since it uses less digits than its factorization.

1203990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1203990 is about 1097.2647811718. The cubic root of 1203990 is about 106.3835046130.

The spelling of 1203990 in words is "one million, two hundred three thousand, nine hundred ninety".