420643526 has 8 divisors (see below), whose sum is σ = 651319104. Its totient is φ = 203537160.

The previous prime is 420643519. The next prime is 420643537. The reversal of 420643526 is 625346024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420643492 and 420643501.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3392225 + ... + 3392348.

It is an arithmetic number, because the mean of its divisors is an integer number (81414888).

Almost surely, 2^420643526 is an apocalyptic number.

420643526 is a deficient number, since it is larger than the sum of its proper divisors (230675578).

420643526 is a wasteful number, since it uses less digits than its factorization.

420643526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784606.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 420643526 is about 20509.5959492136. The cubic root of 420643526 is about 749.2695264050.

The spelling of 420643526 in words is "four hundred twenty million, six hundred forty-three thousand, five hundred twenty-six".