402424341421 has 8 divisors (see below), whose sum is σ = 402854283000. Its totient is φ = 401994616320.

The previous prime is 402424341413. The next prime is 402424341427. The reversal of 402424341421 is 124143424204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 116615420100 + 285808921321 = 341490^2 + 534611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402424341421 - 2³ = 402424341413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402424341427) 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, 3811855 + ... + 3916003.

It is an arithmetic number, because the mean of its divisors is an integer number (50356785375).

Almost surely, 2^402424341421 is an apocalyptic number.

It is an amenable number.

402424341421 is a deficient number, since it is larger than the sum of its proper divisors (429941579).

402424341421 is a wasteful number, since it uses less digits than its factorization.

402424341421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108239.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 402424341421 its reverse (124143424204), we get a palindrome (526567765625).

The spelling of 402424341421 in words is "four hundred two billion, four hundred twenty-four million, three hundred forty-one thousand, four hundred twenty-one".