642642033 has 16 divisors (see below), whose sum is σ = 945259200. Its totient is φ = 385102080.

The previous prime is 642642031. The next prime is 642642079. The reversal of 642642033 is 330246246.

It is a happy number.

642642033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642642033 - 2¹ = 642642031 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642642031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106468 + ... + 112341.

It is an arithmetic number, because the mean of its divisors is an integer number (59078700).

Almost surely, 2^642642033 is an apocalyptic number.

It is an amenable number.

642642033 is a deficient number, since it is larger than the sum of its proper divisors (302617167).

642642033 is a wasteful number, since it uses less digits than its factorization.

642642033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218912.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 642642033 is about 25350.3852633446. The cubic root of 642642033 is about 862.9580995157.

Adding to 642642033 its reverse (330246246), we get a palindrome (972888279).

The spelling of 642642033 in words is "six hundred forty-two million, six hundred forty-two thousand, thirty-three".