421002365 has 24 divisors (see below), whose sum is σ = 622260792. Its totient is φ = 271703040.

The previous prime is 421002343. The next prime is 421002397. The reversal of 421002365 is 563200124.

It can be written as a sum of positive squares in 4 ways, for example, as 196392196 + 224610169 = 14014^2 + 14987^2 .

It is not a de Polignac number, because 421002365 - 2¹⁶ = 420936829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421002365.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46376 + ... + 54705.

It is an arithmetic number, because the mean of its divisors is an integer number (25927533).

Almost surely, 2^421002365 is an apocalyptic number.

It is an amenable number.

421002365 is a deficient number, since it is larger than the sum of its proper divisors (201258427).

421002365 is a wasteful number, since it uses less digits than its factorization.

421002365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101117 (or 101110 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 421002365 is about 20518.3421601259. The cubic root of 421002365 is about 749.4825260060.

Adding to 421002365 its reverse (563200124), we get a palindrome (984202489).

The spelling of 421002365 in words is "four hundred twenty-one million, two thousand, three hundred sixty-five".