505421402 has 16 divisors (see below), whose sum is σ = 764411040. Its totient is φ = 250626768.

The previous prime is 505421393. The next prime is 505421429. The reversal of 505421402 is 204124505.

It is a happy number.

It is an unprimeable number.

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, 123749 + ... + 127767.

It is an arithmetic number, because the mean of its divisors is an integer number (47775690).

Almost surely, 2^505421402 is an apocalyptic number.

505421402 is a deficient number, since it is larger than the sum of its proper divisors (258989638).

505421402 is a wasteful number, since it uses less digits than its factorization.

505421402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 505421402 is about 22481.5791705120. The cubic root of 505421402 is about 796.5588663468.

Adding to 505421402 its reverse (204124505), we get a palindrome (709545907).

The spelling of 505421402 in words is "five hundred five million, four hundred twenty-one thousand, four hundred two".