420502 has 8 divisors (see below), whose sum is σ = 642816. Its totient is φ = 206232.

The previous prime is 420499. The next prime is 420503. The reversal of 420502 is 205024.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420503) 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, 1878 + ... + 2089.

It is an arithmetic number, because the mean of its divisors is an integer number (80352).

2⁴²⁰⁵⁰² is an apocalyptic number.

420502 is a deficient number, since it is larger than the sum of its proper divisors (222314).

420502 is a wasteful number, since it uses less digits than its factorization.

420502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 420502 is about 648.4612555890. The cubic root of 420502 is about 74.9185486113.

Adding to 420502 its reverse (205024), we get a palindrome (625526).

It can be divided in two parts, 42050 and 2, that multiplied together give a square (84100 = 290²).

The spelling of 420502 in words is "four hundred twenty thousand, five hundred two".