420782541 has 4 divisors (see below), whose sum is σ = 561043392. Its totient is φ = 280521692.

The previous prime is 420782503. The next prime is 420782543. The reversal of 420782541 is 145287024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420782541 - 2⁷ = 420782413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420782543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 70130421 + ... + 70130426.

It is an arithmetic number, because the mean of its divisors is an integer number (140260848).

Almost surely, 2^420782541 is an apocalyptic number.

It is an amenable number.

420782541 is a deficient number, since it is larger than the sum of its proper divisors (140260851).

420782541 is a wasteful number, since it uses less digits than its factorization.

420782541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140260850.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 420782541 is about 20512.9846926282. The cubic root of 420782541 is about 749.3520572771.

The spelling of 420782541 in words is "four hundred twenty million, seven hundred eighty-two thousand, five hundred forty-one".