42272723 has 4 divisors (see below), whose sum is σ = 42517248. Its totient is φ = 42028200.

The previous prime is 42272719. The next prime is 42272729. The reversal of 42272723 is 32727224.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42272723 - 2² = 42272719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42272729) 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, 122003 + ... + 122348.

It is an arithmetic number, because the mean of its divisors is an integer number (10629312).

Almost surely, 2^42272723 is an apocalyptic number.

42272723 is a deficient number, since it is larger than the sum of its proper divisors (244525).

42272723 is a wasteful number, since it uses less digits than its factorization.

42272723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244524.

The product of its digits is 9408, while the sum is 29.

The square root of 42272723 is about 6501.7476881220. The cubic root of 42272723 is about 348.3534167787.

Adding to 42272723 its reverse (32727224), we get a palindrome (74999947).

The spelling of 42272723 in words is "forty-two million, two hundred seventy-two thousand, seven hundred twenty-three".