420245541 has 12 divisors (see below), whose sum is σ = 608555532. Its totient is φ = 279455616.

The previous prime is 420245537. The next prime is 420245543. The reversal of 420245541 is 145542024.

420245541 is a `hidden beast` number, since 4 + 202 + 455 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91584900 + 328660641 = 9570^2 + 18129^2 .

It is not a de Polignac number, because 420245541 - 2² = 420245537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420245543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55236 + ... + 62381.

It is an arithmetic number, because the mean of its divisors is an integer number (50712961).

Almost surely, 2^420245541 is an apocalyptic number.

It is an amenable number.

420245541 is a deficient number, since it is larger than the sum of its proper divisors (188309991).

420245541 is a wasteful number, since it uses less digits than its factorization.

420245541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118020 (or 118017 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 420245541 is about 20499.8912436140. The cubic root of 420245541 is about 749.0331488006.

Adding to 420245541 its reverse (145542024), we get a palindrome (565787565).

The spelling of 420245541 in words is "four hundred twenty million, two hundred forty-five thousand, five hundred forty-one".