421001395 has 4 divisors (see below), whose sum is σ = 505201680. Its totient is φ = 336801112.

The previous prime is 421001389. The next prime is 421001423. The reversal of 421001395 is 593100124.

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 421001395 - 2¹⁷ = 420870323 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42100135 + ... + 42100144.

It is an arithmetic number, because the mean of its divisors is an integer number (126300420).

Almost surely, 2^421001395 is an apocalyptic number.

421001395 is a deficient number, since it is larger than the sum of its proper divisors (84200285).

421001395 is an equidigital number, since it uses as much as digits as its factorization.

421001395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84200284.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 421001395 is about 20518.3185227250. The cubic root of 421001395 is about 749.4819503967.

The spelling of 421001395 in words is "four hundred twenty-one million, one thousand, three hundred ninety-five".