1642041273 has 4 divisors (see below), whose sum is σ = 2189388368. Its totient is φ = 1094694180.

The previous prime is 1642041257. The next prime is 1642041281. The reversal of 1642041273 is 3721402461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1642041273 - 2⁴ = 1642041257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642041273.

It is not an unprimeable number, because it can be changed into a prime (1642048273) 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, 273673543 + ... + 273673548.

It is an arithmetic number, because the mean of its divisors is an integer number (547347092).

Almost surely, 2^1642041273 is an apocalyptic number.

It is an amenable number.

1642041273 is a deficient number, since it is larger than the sum of its proper divisors (547347095).

1642041273 is an equidigital number, since it uses as much as digits as its factorization.

1642041273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547347094.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1642041273 is about 40522.1084471181. The cubic root of 1642041273 is about 1179.7627774110.

The spelling of 1642041273 in words is "one billion, six hundred forty-two million, forty-one thousand, two hundred seventy-three".