402421124205 has 24 divisors (see below), whose sum is σ = 699599796792. Its totient is φ = 213987723264.

The previous prime is 402421124201. The next prime is 402421124207. The reversal of 402421124205 is 502421124204.

It is a happy number.

402421124205 is a `hidden beast` number, since 4 + 0 + 24 + 211 + 2 + 420 + 5 = 666.

402421124205 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1055795049 + 401365329156 = 32493^2 + 633534^2 .

It is not a de Polignac number, because 402421124205 - 2² = 402421124201 is a prime.

It is a super-2 number, since 2×402421124205² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421124201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13252924 + ... + 13283253.

It is an arithmetic number, because the mean of its divisors is an integer number (29149991533).

Almost surely, 2^402421124205 is an apocalyptic number.

402421124205 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402421124205 is a deficient number, since it is larger than the sum of its proper divisors (297178672587).

402421124205 is a wasteful number, since it uses less digits than its factorization.

402421124205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26536525 (or 26536522 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 402421124205 its reverse (502421124204), we get a palindrome (904842248409).

Subtracting 402421124205 from its reverse (502421124204), we obtain a palindrome (99999999999).

The spelling of 402421124205 in words is "four hundred two billion, four hundred twenty-one million, one hundred twenty-four thousand, two hundred five".