1620002 has 8 divisors (see below), whose sum is σ = 2440812. Its totient is φ = 806400.

The previous prime is 1620001. The next prime is 1620013. The reversal of 1620002 is 2000261.

It can be written as a sum of positive squares in 2 ways, for example, as 1510441 + 109561 = 1229^2 + 331^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199 + ... + 2162.

2^1620002 is an apocalyptic number.

1620002 is a deficient number, since it is larger than the sum of its proper divisors (820810).

1620002 is a wasteful number, since it uses less digits than its factorization.

1620002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1620002 is about 1272.7929918097. The cubic root of 1620002 is about 117.4460775667.

Adding to 1620002 its reverse (2000261), we get a palindrome (3620263).

The spelling of 1620002 in words is "one million, six hundred twenty thousand, two".