421001365 has 4 divisors (see below), whose sum is σ = 505201644. Its totient is φ = 336801088.

The previous prime is 421001351. The next prime is 421001369. The reversal of 421001365 is 563100124.

421001365 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 255776049 + 165225316 = 15993^2 + 12854^2 .

It is a cyclic number.

It is not a de Polignac number, because 421001365 - 2⁵ = 421001333 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 (421001369) 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, 42100132 + ... + 42100141.

It is an arithmetic number, because the mean of its divisors is an integer number (126300411).

Almost surely, 2^421001365 is an apocalyptic number.

It is an amenable number.

421001365 is a deficient number, since it is larger than the sum of its proper divisors (84200279).

421001365 is an equidigital number, since it uses as much as digits as its factorization.

421001365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84200278.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 421001365 is about 20518.3177916709. The cubic root of 421001365 is about 749.4819325943.

Adding to 421001365 its reverse (563100124), we get a palindrome (984101489).

The spelling of 421001365 in words is "four hundred twenty-one million, one thousand, three hundred sixty-five".