1620271201 has 8 divisors (see below), whose sum is σ = 1628409024. Its totient is φ = 1612148880.

The previous prime is 1620271199. The next prime is 1620271249. The reversal of 1620271201 is 1021720261.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1620271201 - 2¹ = 1620271199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620271001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 244210 + ... + 250756.

It is an arithmetic number, because the mean of its divisors is an integer number (203551128).

Almost surely, 2^1620271201 is an apocalyptic number.

It is an amenable number.

1620271201 is a deficient number, since it is larger than the sum of its proper divisors (8137823).

1620271201 is an equidigital number, since it uses as much as digits as its factorization.

1620271201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1620271201 is about 40252.5924755164. The cubic root of 1620271201 is about 1174.5258267197.

Adding to 1620271201 its reverse (1021720261), we get a palindrome (2641991462).

The spelling of 1620271201 in words is "one billion, six hundred twenty million, two hundred seventy-one thousand, two hundred one".