420526 has 4 divisors (see below), whose sum is σ = 630792. Its totient is φ = 210262.

The previous prime is 420521. The next prime is 420551. The reversal of 420526 is 625024.

420526 is nontrivially palindromic in base 5.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420521) 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 as a sum of consecutive naturals, namely, 105130 + ... + 105133.

It is an arithmetic number, because the mean of its divisors is an integer number (157698).

2⁴²⁰⁵²⁶ is an apocalyptic number.

420526 is a deficient number, since it is larger than the sum of its proper divisors (210266).

420526 is a wasteful number, since it uses less digits than its factorization.

420526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210265.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 420526 is about 648.4797606711. The cubic root of 420526 is about 74.9199739006.

It can be divided in two parts, 420 and 526, that added together give a triangular number (946 = T₄₃).

The spelling of 420526 in words is "four hundred twenty thousand, five hundred twenty-six".