42722023 has 4 divisors (see below), whose sum is σ = 43100208. Its totient is φ = 42343840.

The previous prime is 42721981. The next prime is 42722027. The reversal of 42722023 is 32022724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42722023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42721985 and 42722003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42722027) 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, 188923 + ... + 189148.

It is an arithmetic number, because the mean of its divisors is an integer number (10775052).

Almost surely, 2^42722023 is an apocalyptic number.

42722023 is a deficient number, since it is larger than the sum of its proper divisors (378185).

42722023 is a wasteful number, since it uses less digits than its factorization.

42722023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378184.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 42722023 is about 6536.2086105020. The cubic root of 42722023 is about 349.5832399974.

Adding to 42722023 its reverse (32022724), we get a palindrome (74744747).

The spelling of 42722023 in words is "forty-two million, seven hundred twenty-two thousand, twenty-three".