1642272001 has 12 divisors (see below), whose sum is σ = 1704975532. Its totient is φ = 1581801984.

The previous prime is 1642271993. The next prime is 1642272007. The reversal of 1642272001 is 1002722461.

It can be written as a sum of positive squares in 6 ways, for example, as 19793601 + 1622478400 = 4449^2 + 40280^2 .

It is not a de Polignac number, because 1642272001 - 2³ = 1642271993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642272007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382201 + ... + 386473.

Almost surely, 2^1642272001 is an apocalyptic number.

It is an amenable number.

1642272001 is a deficient number, since it is larger than the sum of its proper divisors (62703531).

1642272001 is an equidigital number, since it uses as much as digits as its factorization.

1642272001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788 (or 4759 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1642272001 is about 40524.9552868353. The cubic root of 1642272001 is about 1179.8180321240.

Adding to 1642272001 its reverse (1002722461), we get a palindrome (2644994462).

The spelling of 1642272001 in words is "one billion, six hundred forty-two million, two hundred seventy-two thousand, one".