421041405 has 16 divisors (see below), whose sum is σ = 685085760. Its totient is φ = 220748928.

The previous prime is 421041377. The next prime is 421041419. The reversal of 421041405 is 504140124.

It is a happy number.

It is not a de Polignac number, because 421041405 - 2⁵ = 421041373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236992 + ... + 238761.

It is an arithmetic number, because the mean of its divisors is an integer number (42817860).

Almost surely, 2^421041405 is an apocalyptic number.

It is an amenable number.

421041405 is a deficient number, since it is larger than the sum of its proper divisors (264044355).

421041405 is a wasteful number, since it uses less digits than its factorization.

421041405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475820.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 421041405 is about 20519.2934819891. The cubic root of 421041405 is about 749.5056920622.

Adding to 421041405 its reverse (504140124), we get a palindrome (925181529).

The spelling of 421041405 in words is "four hundred twenty-one million, forty-one thousand, four hundred five".