420444001 has 4 divisors (see below), whose sum is σ = 434942100. Its totient is φ = 405945904.

The previous prime is 420443941. The next prime is 420444007. The reversal of 420444001 is 100444024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 296700625 + 123743376 = 17225^2 + 11124^2 .

It is a cyclic number.

It is not a de Polignac number, because 420444001 - 2⁹ = 420443489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420444001.

It is not an unprimeable number, because it can be changed into a prime (420444007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7249006 + ... + 7249063.

It is an arithmetic number, because the mean of its divisors is an integer number (108735525).

Almost surely, 2^420444001 is an apocalyptic number.

It is an amenable number.

420444001 is a deficient number, since it is larger than the sum of its proper divisors (14498099).

420444001 is a wasteful number, since it uses less digits than its factorization.

420444001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14498098.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 420444001 is about 20504.7311857532. The cubic root of 420444001 is about 749.1510399777.

Adding to 420444001 its reverse (100444024), we get a palindrome (520888025).

It can be divided in two parts, 4204 and 44001, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 420444001 in words is "four hundred twenty million, four hundred forty-four thousand, one".