1620250201 has 4 divisors (see below), whose sum is σ = 1620330804. Its totient is φ = 1620169600.

The previous prime is 1620250189. The next prime is 1620250217. The reversal of 1620250201 is 1020520261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1361683801 + 258566400 = 36901^2 + 16080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620250201 - 2¹¹ = 1620248153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620250241) 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 3 ways as a sum of consecutive naturals, for example, 17181 + ... + 59461.

It is an arithmetic number, because the mean of its divisors is an integer number (405082701).

Almost surely, 2^1620250201 is an apocalyptic number.

It is an amenable number.

1620250201 is a deficient number, since it is larger than the sum of its proper divisors (80603).

1620250201 is an equidigital number, since it uses as much as digits as its factorization.

1620250201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80602.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1620250201 is about 40252.3316219073. The cubic root of 1620250201 is about 1174.5207524356.

Adding to 1620250201 its reverse (1020520261), we get a palindrome (2640770462).

The spelling of 1620250201 in words is "one billion, six hundred twenty million, two hundred fifty thousand, two hundred one".