421401365 has 16 divisors (see below), whose sum is σ = 630460800. Its totient is φ = 262691520.

The previous prime is 421401341. The next prime is 421401371. The reversal of 421401365 is 563104124.

It is not a de Polignac number, because 421401365 - 2¹⁰ = 421400341 is a prime.

It is a super-2 number, since 2×421401365² = 355158220847726450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546890 + ... + 547659.

It is an arithmetic number, because the mean of its divisors is an integer number (39403800).

Almost surely, 2^421401365 is an apocalyptic number.

It is an amenable number.

421401365 is a deficient number, since it is larger than the sum of its proper divisors (209059435).

421401365 is a wasteful number, since it uses less digits than its factorization.

421401365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094572.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 421401365 is about 20528.0628652584. The cubic root of 421401365 is about 749.7192223057.

Adding to 421401365 its reverse (563104124), we get a palindrome (984505489).

The spelling of 421401365 in words is "four hundred twenty-one million, four hundred one thousand, three hundred sixty-five".