420055569 has 12 divisors (see below), whose sum is σ = 610101492. Its totient is φ = 278488800.

The previous prime is 420055523. The next prime is 420055583. The reversal of 420055569 is 965550024.

420055569 is a `hidden beast` number, since 42 + 0 + 0 + 55 + 569 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15563025 + 404492544 = 3945^2 + 20112^2 .

It is not a de Polignac number, because 420055569 - 2¹² = 420051473 is a prime.

It is a super-2 number, since 2×420055569² = 352893362095827522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420055469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127302 + ... + 130559.

It is an arithmetic number, because the mean of its divisors is an integer number (50841791).

Almost surely, 2^420055569 is an apocalyptic number.

It is an amenable number.

420055569 is a deficient number, since it is larger than the sum of its proper divisors (190045923).

420055569 is a wasteful number, since it uses less digits than its factorization.

420055569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258048 (or 258045 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 420055569 is about 20495.2572318573. The cubic root of 420055569 is about 748.9202649756.

It can be divided in two parts, 42005 and 5569, that added together give a palindrome (47574).

The spelling of 420055569 in words is "four hundred twenty million, fifty-five thousand, five hundred sixty-nine".