420524839 has 8 divisors (see below), whose sum is σ = 490825728. Its totient is φ = 352780440.

The previous prime is 420524833. The next prime is 420524849. The reversal of 420524839 is 938425024.

It is a happy number.

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 420524839 - 2⁵ = 420524807 is a prime.

It is a super-2 number, since 2×420524839² = 353682280431951842, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420524798 and 420524807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420524833) by changing a digit.

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, 638767 + ... + 639424.

It is an arithmetic number, because the mean of its divisors is an integer number (61353216).

Almost surely, 2^420524839 is an apocalyptic number.

420524839 is a deficient number, since it is larger than the sum of its proper divisors (70300889).

420524839 is a wasteful number, since it uses less digits than its factorization.

420524839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278245.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 420524839 is about 20506.7022946158. The cubic root of 420524839 is about 749.1990495349.

The spelling of 420524839 in words is "four hundred twenty million, five hundred twenty-four thousand, eight hundred thirty-nine".