420502123 has 8 divisors (see below), whose sum is σ = 464596128. Its totient is φ = 378559104.

The previous prime is 420502099. The next prime is 420502163. The reversal of 420502123 is 321205024.

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 420502123 - 2¹⁷ = 420371051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420502123.

It is not an unprimeable number, because it can be changed into a prime (420502163) 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, 537336 + ... + 538117.

It is an arithmetic number, because the mean of its divisors is an integer number (58074516).

Almost surely, 2^420502123 is an apocalyptic number.

420502123 is a deficient number, since it is larger than the sum of its proper divisors (44094005).

420502123 is a wasteful number, since it uses less digits than its factorization.

420502123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075493.

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

The square root of 420502123 is about 20506.1484194375. The cubic root of 420502123 is about 749.1855591609.

Adding to 420502123 its reverse (321205024), we get a palindrome (741707147).

The spelling of 420502123 in words is "four hundred twenty million, five hundred two thousand, one hundred twenty-three".