402422 has 4 divisors (see below), whose sum is σ = 603636. Its totient is φ = 201210.

The previous prime is 402419. The next prime is 402443. The reversal of 402422 is 224204.

It is a happy number.

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

It is an Ulam number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402397 and 402406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100604 + ... + 100607.

It is an arithmetic number, because the mean of its divisors is an integer number (150909).

2⁴⁰²⁴²² is an apocalyptic number.

402422 is a deficient number, since it is larger than the sum of its proper divisors (201214).

402422 is a wasteful number, since it uses less digits than its factorization.

402422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201213.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402422 is about 634.3674014323. The cubic root of 402422 is about 73.8290428994.

Adding to 402422 its reverse (224204), we get a palindrome (626626).

The spelling of 402422 in words is "four hundred two thousand, four hundred twenty-two", and thus it is an iban number.