420005722 has 16 divisors (see below), whose sum is σ = 662821992. Its totient is φ = 199342080.

The previous prime is 420005711. The next prime is 420005743. The reversal of 420005722 is 227500024.

It can be written as a sum of positive squares in 4 ways, for example, as 417752721 + 2253001 = 20439^2 + 1501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420005693 and 420005702.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 66183 + ... + 72250.

Almost surely, 2^420005722 is an apocalyptic number.

420005722 is a deficient number, since it is larger than the sum of its proper divisors (242816270).

420005722 is a wasteful number, since it uses less digits than its factorization.

420005722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138513.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 420005722 is about 20494.0411339492. The cubic root of 420005722 is about 748.8906396054.

Adding to 420005722 its reverse (227500024), we get a palindrome (647505746).

The spelling of 420005722 in words is "four hundred twenty million, five thousand, seven hundred twenty-two".