505120402 has 16 divisors (see below), whose sum is σ = 765342720. Its totient is φ = 250015248.

The previous prime is 505120397. The next prime is 505120409. The reversal of 505120402 is 204021505.

It is a self number, because there is not a number n which added to its sum of digits gives 505120402.

It is not an unprimeable number, because it can be changed into a prime (505120409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127333 + ... + 131239.

It is an arithmetic number, because the mean of its divisors is an integer number (47833920).

Almost surely, 2^505120402 is an apocalyptic number.

505120402 is a deficient number, since it is larger than the sum of its proper divisors (260222318).

505120402 is a wasteful number, since it uses less digits than its factorization.

505120402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 505120402 is about 22474.8838039266. The cubic root of 505120402 is about 796.4007066869.

Adding to 505120402 its reverse (204021505), we get a palindrome (709141907).

The spelling of 505120402 in words is "five hundred five million, one hundred twenty thousand, four hundred two".