642841023 has 16 divisors (see below), whose sum is σ = 935465472. Its totient is φ = 389424000.

The previous prime is 642840977. The next prime is 642841027. The reversal of 642841023 is 320148246.

It is not a de Polignac number, because 642841023 - 2¹⁰ = 642839999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642841027) 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, 138663 + ... + 143223.

It is an arithmetic number, because the mean of its divisors is an integer number (58466592).

Almost surely, 2^642841023 is an apocalyptic number.

642841023 is a deficient number, since it is larger than the sum of its proper divisors (292624449).

642841023 is a wasteful number, since it uses less digits than its factorization.

642841023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8846.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 642841023 is about 25354.3097519929. The cubic root of 642841023 is about 863.0471601448.

Adding to 642841023 its reverse (320148246), we get a palindrome (962989269).

The spelling of 642841023 in words is "six hundred forty-two million, eight hundred forty-one thousand, twenty-three".