420532561 has 8 divisors (see below), whose sum is σ = 430768800. Its totient is φ = 410317152.

The previous prime is 420532559. The next prime is 420532583. The reversal of 420532561 is 165235024.

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 420532561 - 2¹ = 420532559 is a prime.

It is a super-2 number, since 2×420532561² = 353695269722437442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420532501) 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 7 ways as a sum of consecutive naturals, for example, 40446 + ... + 49768.

It is an arithmetic number, because the mean of its divisors is an integer number (53846100).

Almost surely, 2^420532561 is an apocalyptic number.

It is an amenable number.

420532561 is a deficient number, since it is larger than the sum of its proper divisors (10236239).

420532561 is a wasteful number, since it uses less digits than its factorization.

420532561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10415.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 420532561 is about 20506.8905736584. The cubic root of 420532561 is about 749.2036352962.

Adding to 420532561 its reverse (165235024), we get a palindrome (585767585).

The spelling of 420532561 in words is "four hundred twenty million, five hundred thirty-two thousand, five hundred sixty-one".