402212 has 12 divisors (see below), whose sum is σ = 708876. Its totient is φ = 199680.

The previous prime is 402197. The next prime is 402221. The reversal of 402212 is 212204.

402212 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 106276 + 295936 = 326^2 + 544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402193 and 402202.

It is an unprimeable number.

402212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (59073).

2⁴⁰²²¹² is an apocalyptic number.

It is an amenable number.

402212 is a deficient number, since it is larger than the sum of its proper divisors (306664).

402212 is a wasteful number, since it uses less digits than its factorization.

402212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 402212 is about 634.2018606091. The cubic root of 402212 is about 73.8161983426.

Adding to 402212 its reverse (212204), we get a palindrome (614416).

The spelling of 402212 in words is "four hundred two thousand, two hundred twelve", and thus it is an iban number.