42454721 has 8 divisors (see below), whose sum is σ = 45780000. Its totient is φ = 39238560.

The previous prime is 42454681. The next prime is 42454733. The reversal of 42454721 is 12745424.

42454721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42454721 - 2¹⁴ = 42438337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42454121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26471 + ... + 28028.

It is an arithmetic number, because the mean of its divisors is an integer number (5722500).

Almost surely, 2^42454721 is an apocalyptic number.

42454721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42454721 is a deficient number, since it is larger than the sum of its proper divisors (3325279).

42454721 is a wasteful number, since it uses less digits than its factorization.

42454721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54559.

The product of its digits is 8960, while the sum is 29.

The square root of 42454721 is about 6515.7287389823. The cubic root of 42454721 is about 348.8526264520.

The spelling of 42454721 in words is "forty-two million, four hundred fifty-four thousand, seven hundred twenty-one".