42272021 has 8 divisors (see below), whose sum is σ = 46164384. Its totient is φ = 38387920.

The previous prime is 42272011. The next prime is 42272023. The reversal of 42272021 is 12027224.

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 42272021 - 2¹⁴ = 42255637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42271984 and 42272002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42272023) 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, 14351 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (5770548).

Almost surely, 2^42272021 is an apocalyptic number.

It is an amenable number.

42272021 is a deficient number, since it is larger than the sum of its proper divisors (3892363).

42272021 is a wasteful number, since it uses less digits than its factorization.

42272021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 42272021 is about 6501.6937024132. The cubic root of 42272021 is about 348.3514884631.

Adding to 42272021 its reverse (12027224), we get a palindrome (54299245).

The spelling of 42272021 in words is "forty-two million, two hundred seventy-two thousand, twenty-one".