1662201 has 10 divisors (see below), whose sum is σ = 2483162. Its totient is φ = 1108080.

The previous prime is 1662191. The next prime is 1662211. The reversal of 1662201 is 1022661.

It is a happy number.

1662201 is a `hidden beast` number, since 1 + 662 + 2 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1662191) and next prime (1662211).

It can be written as a sum of positive squares in only one way, i.e., 1498176 + 164025 = 1224^2 + 405^2 .

It is not a de Polignac number, because 1662201 - 2¹⁷ = 1531129 is a prime.

It is a Duffinian number.

1662201 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1662211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10180 + ... + 10341.

2^1662201 is an apocalyptic number.

It is an amenable number.

1662201 is a deficient number, since it is larger than the sum of its proper divisors (820961).

1662201 is an equidigital number, since it uses as much as digits as its factorization.

1662201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533 (or 20524 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1662201 is about 1289.2637433822. The cubic root of 1662201 is about 118.4571227666.

Adding to 1662201 its reverse (1022661), we get a palindrome (2684862).

The spelling of 1662201 in words is "one million, six hundred sixty-two thousand, two hundred one".