421788001 has 4 divisors (see below), whose sum is σ = 423630100. Its totient is φ = 419945904.

The previous prime is 421787983. The next prime is 421788047. The reversal of 421788001 is 100887124.

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 202777600 + 219010401 = 14240^2 + 14799^2 .

It is a cyclic number.

It is not a de Polignac number, because 421788001 - 2¹¹ = 421785953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421788401) 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, 920706 + ... + 921163.

It is an arithmetic number, because the mean of its divisors is an integer number (105907525).

Almost surely, 2^421788001 is an apocalyptic number.

It is an amenable number.

421788001 is a deficient number, since it is larger than the sum of its proper divisors (1842099).

421788001 is a wasteful number, since it uses less digits than its factorization.

421788001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842098.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 421788001 is about 20537.4779610350. The cubic root of 421788001 is about 749.9484414927.

The spelling of 421788001 in words is "four hundred twenty-one million, seven hundred eighty-eight thousand, one".