420052621 has 4 divisors (see below), whose sum is σ = 420314652. Its totient is φ = 419790592.

The previous prime is 420052553. The next prime is 420052631. The reversal of 420052621 is 126250024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253255396 + 166797225 = 15914^2 + 12915^2 .

It is a cyclic number.

It is not a de Polignac number, because 420052621 - 2¹¹ = 420050573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420052592 and 420052601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420052631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128596 + ... + 131821.

It is an arithmetic number, because the mean of its divisors is an integer number (105078663).

Almost surely, 2^420052621 is an apocalyptic number.

It is an amenable number.

420052621 is a deficient number, since it is larger than the sum of its proper divisors (262031).

420052621 is a wasteful number, since it uses less digits than its factorization.

420052621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262030.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 420052621 is about 20495.1853126533. The cubic root of 420052621 is about 748.9185129677.

The spelling of 420052621 in words is "four hundred twenty million, fifty-two thousand, six hundred twenty-one".