421888541 has 8 divisors (see below), whose sum is σ = 458779320. Its totient is φ = 386339328.

The previous prime is 421888529. The next prime is 421888561. The reversal of 421888541 is 145888124.

It can be written as a sum of positive squares in 4 ways, for example, as 70476025 + 351412516 = 8395^2 + 18746^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421888541 - 2⁶ = 421888477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421888561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334736 + ... + 335993.

It is an arithmetic number, because the mean of its divisors is an integer number (57347415).

Almost surely, 2^421888541 is an apocalyptic number.

It is an amenable number.

421888541 is a deficient number, since it is larger than the sum of its proper divisors (36890779).

421888541 is a wasteful number, since it uses less digits than its factorization.

421888541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670783.

The product of its digits is 81920, while the sum is 41.

The square root of 421888541 is about 20539.9255354054. The cubic root of 421888541 is about 750.0080242104.

The spelling of 421888541 in words is "four hundred twenty-one million, eight hundred eighty-eight thousand, five hundred forty-one".