42240023 has 8 divisors (see below), whose sum is σ = 48817440. Its totient is φ = 35798400.

The previous prime is 42240017. The next prime is 42240031. The reversal of 42240023 is 32004224.

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 42240023 - 2¹⁴ = 42223639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42239983 and 42240010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240013) 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, 33278 + ... + 34523.

It is an arithmetic number, because the mean of its divisors is an integer number (6102180).

Almost surely, 2^42240023 is an apocalyptic number.

42240023 is a deficient number, since it is larger than the sum of its proper divisors (6577417).

42240023 is an equidigital number, since it uses as much as digits as its factorization.

42240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67897.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 42240023 is about 6499.2324931487. The cubic root of 42240023 is about 348.2635708576.

Adding to 42240023 its reverse (32004224), we get a palindrome (74244247).

The spelling of 42240023 in words is "forty-two million, two hundred forty thousand, twenty-three".