642026023 has 8 divisors (see below), whose sum is σ = 658904400. Its totient is φ = 625347648.

The previous prime is 642025997. The next prime is 642026039. The reversal of 642026023 is 320620246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642026023 - 2⁹ = 642025511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642026423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43486 + ... + 56347.

It is an arithmetic number, because the mean of its divisors is an integer number (82363050).

Almost surely, 2^642026023 is an apocalyptic number.

642026023 is a deficient number, since it is larger than the sum of its proper divisors (16878377).

642026023 is a wasteful number, since it uses less digits than its factorization.

642026023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100001.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 642026023 is about 25338.2324363796. The cubic root of 642026023 is about 862.6822794190.

Adding to 642026023 its reverse (320620246), we get a palindrome (962646269).

It can be divided in two parts, 64202 and 6023, that added together give a square (70225 = 265²).

The spelling of 642026023 in words is "six hundred forty-two million, twenty-six thousand, twenty-three".