402421204 has 6 divisors (see below), whose sum is σ = 704237114. Its totient is φ = 201210600.

The previous prime is 402421193. The next prime is 402421207. The reversal of 402421204 is 402124204.

It can be written as a sum of positive squares in only one way, i.e., 336649104 + 65772100 = 18348^2 + 8110^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50302647 + ... + 50302654.

Almost surely, 2^402421204 is an apocalyptic number.

It is an amenable number.

402421204 is a deficient number, since it is larger than the sum of its proper divisors (301815910).

402421204 is a wasteful number, since it uses less digits than its factorization.

402421204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100605305 (or 100605303 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402421204 is about 20060.4387788503. The cubic root of 402421204 is about 738.2899422084.

Adding to 402421204 its reverse (402124204), we get a palindrome (804545408).

The spelling of 402421204 in words is "four hundred two million, four hundred twenty-one thousand, two hundred four".