1681203 has 8 divisors (see below), whose sum is σ = 2247616. Its totient is φ = 1117800.

The previous prime is 1681201. The next prime is 1681219. The reversal of 1681203 is 3021861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1681203 - 2¹ = 1681201 is a prime.

It is a Duffinian number.

1681203 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681203.

It is not an unprimeable number, because it can be changed into a prime (1681201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668 + ... + 2478.

It is an arithmetic number, because the mean of its divisors is an integer number (280952).

2^1681203 is an apocalyptic number.

1681203 is a deficient number, since it is larger than the sum of its proper divisors (566413).

1681203 is an equidigital number, since it uses as much as digits as its factorization.

1681203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1681203 is about 1296.6121239600. The cubic root of 1681203 is about 118.9068074363.

The spelling of 1681203 in words is "one million, six hundred eighty-one thousand, two hundred three".