1630201 has 4 divisors (see below), whose sum is σ = 1670004. Its totient is φ = 1590400.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630201 is 1020361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104976 + 1525225 = 324^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630201 - 2¹ = 1630199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630261) 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, 19840 + ... + 19921.

It is an arithmetic number, because the mean of its divisors is an integer number (417501).

2^1630201 is an apocalyptic number.

It is an amenable number.

1630201 is a deficient number, since it is larger than the sum of its proper divisors (39803).

1630201 is an equidigital number, since it uses as much as digits as its factorization.

1630201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39802.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1630201 is about 1276.7932487290. The cubic root of 1630201 is about 117.6920294401.

Adding to 1630201 its reverse (1020361), we get a palindrome (2650562).

The spelling of 1630201 in words is "one million, six hundred thirty thousand, two hundred one".