442020451 has 8 divisors (see below), whose sum is σ = 468205920. Its totient is φ = 415855488.

The previous prime is 442020437. The next prime is 442020461. The reversal of 442020451 is 154020244.

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 442020451 - 2⁵ = 442020419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442020461) 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, 76765 + ... + 82321.

It is an arithmetic number, because the mean of its divisors is an integer number (58525740).

Almost surely, 2^442020451 is an apocalyptic number.

442020451 is a deficient number, since it is larger than the sum of its proper divisors (26185469).

442020451 is a wasteful number, since it uses less digits than its factorization.

442020451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 442020451 is about 21024.2824134380. The cubic root of 442020451 is about 761.7529085206.

Adding to 442020451 its reverse (154020244), we get a palindrome (596040695).

The spelling of 442020451 in words is "four hundred forty-two million, twenty thousand, four hundred fifty-one".