402421442441 has 4 divisors (see below), whose sum is σ = 403472151552. Its totient is φ = 401370733332.

The previous prime is 402421442393. The next prime is 402421442491. The reversal of 402421442441 is 144244124204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402421442441 - 2¹⁰ = 402421441417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402421442398 and 402421442407.

It is not an unprimeable number, because it can be changed into a prime (402421442491) 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 3 ways as a sum of consecutive naturals, for example, 525353981 + ... + 525354746.

It is an arithmetic number, because the mean of its divisors is an integer number (100868037888).

Almost surely, 2^402421442441 is an apocalyptic number.

It is an amenable number.

402421442441 is a deficient number, since it is larger than the sum of its proper divisors (1050709111).

402421442441 is a wasteful number, since it uses less digits than its factorization.

402421442441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050709110.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 402421442441 its reverse (144244124204), we get a palindrome (546665566645).

The spelling of 402421442441 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, four hundred forty-one".