381212 has 12 divisors (see below), whose sum is σ = 718536. Its totient is φ = 175920.

The previous prime is 381209. The next prime is 381221. The reversal of 381212 is 212183.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3614 + ... + 3717.

It is an arithmetic number, because the mean of its divisors is an integer number (59878).

2³⁸¹²¹² is an apocalyptic number.

It is an amenable number.

381212 is a deficient number, since it is larger than the sum of its proper divisors (337324).

381212 is a wasteful number, since it uses less digits than its factorization.

381212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7348 (or 7346 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 381212 is about 617.4236794941. The cubic root of 381212 is about 72.5084888990.

Adding to 381212 its reverse (212183), we get a palindrome (593395).

It can be divided in two parts, 38 and 1212, that multiplied together give a triangular number (46056 = T₃₀₃).

The spelling of 381212 in words is "three hundred eighty-one thousand, two hundred twelve".