421541405 has 16 divisors (see below), whose sum is σ = 512179200. Its totient is φ = 333032448.

The previous prime is 421541369. The next prime is 421541431. The reversal of 421541405 is 504145124.

It is a cyclic number.

It is not a de Polignac number, because 421541405 - 2¹⁶ = 421475869 is a prime.

It is a super-2 number, since 2×421541405² = 355394312258748050, which contains 22 as substring.

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, 230324 + ... + 232146.

It is an arithmetic number, because the mean of its divisors is an integer number (32011200).

Almost surely, 2^421541405 is an apocalyptic number.

It is an amenable number.

421541405 is a deficient number, since it is larger than the sum of its proper divisors (90637795).

421541405 is a wasteful number, since it uses less digits than its factorization.

421541405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 421541405 is about 20531.4735223753. The cubic root of 421541405 is about 749.8022619449.

Adding to 421541405 its reverse (504145124), we get a palindrome (925686529).

The spelling of 421541405 in words is "four hundred twenty-one million, five hundred forty-one thousand, four hundred five".