421800007 has 4 divisors (see below), whose sum is σ = 424008576. Its totient is φ = 419591440.

The previous prime is 421799969. The next prime is 421800011. The reversal of 421800007 is 700008124.

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

It is a cyclic number.

It is not a de Polignac number, because 421800007 - 2⁷ = 421799879 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 (421800017) 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 3 ways as a sum of consecutive naturals, for example, 1103998 + ... + 1104379.

It is an arithmetic number, because the mean of its divisors is an integer number (106002144).

Almost surely, 2^421800007 is an apocalyptic number.

421800007 is a deficient number, since it is larger than the sum of its proper divisors (2208569).

421800007 is a wasteful number, since it uses less digits than its factorization.

421800007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208568.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 421800007 is about 20537.7702538518. The cubic root of 421800007 is about 749.9555570702.

The spelling of 421800007 in words is "four hundred twenty-one million, eight hundred thousand, seven".