420005445 has 8 divisors (see below), whose sum is σ = 672008736. Its totient is φ = 224002896.

The previous prime is 420005437. The next prime is 420005447. The reversal of 420005445 is 544500024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420005445 - 2³ = 420005437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420005447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14000167 + ... + 14000196.

It is an arithmetic number, because the mean of its divisors is an integer number (84001092).

Almost surely, 2^420005445 is an apocalyptic number.

It is an amenable number.

420005445 is a deficient number, since it is larger than the sum of its proper divisors (252003291).

420005445 is a wasteful number, since it uses less digits than its factorization.

420005445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28000371.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 420005445 is about 20494.0343758861. The cubic root of 420005445 is about 748.8904749706.

Adding to 420005445 its reverse (544500024), we get a palindrome (964505469).

The spelling of 420005445 in words is "four hundred twenty million, five thousand, four hundred forty-five".