442421453 has 8 divisors (see below), whose sum is σ = 456171936. Its totient is φ = 428828400.

The previous prime is 442421449. The next prime is 442421459. The reversal of 442421453 is 354124244.

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 442421453 - 2² = 442421449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442421459) 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, 33638 + ... + 44903.

It is an arithmetic number, because the mean of its divisors is an integer number (57021492).

Almost surely, 2^442421453 is an apocalyptic number.

442421453 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

442421453 is a deficient number, since it is larger than the sum of its proper divisors (13750483).

442421453 is a wasteful number, since it uses less digits than its factorization.

442421453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78715.

The product of its digits is 15360, while the sum is 29.

The square root of 442421453 is about 21033.8168909021. The cubic root of 442421453 is about 761.9831935772.

Adding to 442421453 its reverse (354124244), we get a palindrome (796545697).

The spelling of 442421453 in words is "four hundred forty-two million, four hundred twenty-one thousand, four hundred fifty-three".