1813602 has 32 divisors (see below), whose sum is σ = 4291200. Its totient is φ = 499968.

The previous prime is 1813597. The next prime is 1813613. The reversal of 1813602 is 2063181.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 474 + ... + 1962.

It is an arithmetic number, because the mean of its divisors is an integer number (134100).

2^1813602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145600).

1813602 is an abundant number, since it is smaller than the sum of its proper divisors (2477598).

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

1813602 is a wasteful number, since it uses less digits than its factorization.

1813602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530.

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

The square root of 1813602 is about 1346.7004121184. The cubic root of 1813602 is about 121.9496791487.

Adding to 1813602 its reverse (2063181), we get a palindrome (3876783).

It can be divided in two parts, 1813 and 602, that added together give a triangular number (2415 = T₆₉).

The spelling of 1813602 in words is "one million, eight hundred thirteen thousand, six hundred two".