402104302421 has 12 divisors (see below), whose sum is σ = 411763232268. Its totient is φ = 392666992704.

The previous prime is 402104302393. The next prime is 402104302447. The reversal of 402104302421 is 124203401204.

It can be written as a sum of positive squares in 2 ways, for example, as 46040284900 + 356064017521 = 214570^2 + 596711^2 .

It is not a de Polignac number, because 402104302421 - 2¹⁰ = 402104301397 is a prime.

It is a super-2 number, since 2×402104302421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402104304421) 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 11 ways as a sum of consecutive naturals, for example, 9432671 + ... + 9475203.

It is an arithmetic number, because the mean of its divisors is an integer number (34313602689).

Almost surely, 2^402104302421 is an apocalyptic number.

It is an amenable number.

402104302421 is a deficient number, since it is larger than the sum of its proper divisors (9658929847).

402104302421 is an equidigital number, since it uses as much as digits as its factorization.

402104302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47732 (or 47689 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 402104302421 its reverse (124203401204), we get a palindrome (526307703625).

The spelling of 402104302421 in words is "four hundred two billion, one hundred four million, three hundred two thousand, four hundred twenty-one".