402421503 has 16 divisors (see below), whose sum is σ = 585703296. Its totient is φ = 243740640.

The previous prime is 402421457. The next prime is 402421507. The reversal of 402421503 is 305124204.

It is not a de Polignac number, because 402421503 - 2⁸ = 402421247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402421503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74376 + ... + 79602.

It is an arithmetic number, because the mean of its divisors is an integer number (36606456).

Almost surely, 2^402421503 is an apocalyptic number.

402421503 is a deficient number, since it is larger than the sum of its proper divisors (183281793).

402421503 is a wasteful number, since it uses less digits than its factorization.

402421503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7574.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 402421503 is about 20060.4462313280. The cubic root of 402421503 is about 738.2901250588.

Adding to 402421503 its reverse (305124204), we get a palindrome (707545707).

The spelling of 402421503 in words is "four hundred two million, four hundred twenty-one thousand, five hundred three".