402421442443 has 4 divisors (see below), whose sum is σ = 415402779328. Its totient is φ = 389440105560.

The previous prime is 402421442393. The next prime is 402421442491. The reversal of 402421442443 is 344244124204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402421442443 - 2¹⁷ = 402421311371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402421442399 and 402421442408.

It is not an unprimeable number, because it can be changed into a prime (402421446443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6490668396 + ... + 6490668457.

It is an arithmetic number, because the mean of its divisors is an integer number (103850694832).

Almost surely, 2^402421442443 is an apocalyptic number.

402421442443 is a deficient number, since it is larger than the sum of its proper divisors (12981336885).

402421442443 is a wasteful number, since it uses less digits than its factorization.

402421442443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12981336884.

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 402421442443 its reverse (344244124204), we get a palindrome (746665566647).

The spelling of 402421442443 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, four hundred forty-three".