3912281 has 4 divisors (see below), whose sum is σ = 3918564. Its totient is φ = 3906000.

The previous prime is 3912263. The next prime is 3912319. The reversal of 3912281 is 1822193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1822193 = 53 ⋅34381.

It can be written as a sum of positive squares in 2 ways, for example, as 2374681 + 1537600 = 1541^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 3912281 - 2⁶ = 3912217 is a prime.

It is a super-2 number, since 2×3912281² = 30611885245922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3912281.

It is not an unprimeable number, because it can be changed into a prime (3912211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (979641).

Almost surely, 2^3912281 is an apocalyptic number.

It is an amenable number.

3912281 is a deficient number, since it is larger than the sum of its proper divisors (6283).

3912281 is an equidigital number, since it uses as much as digits as its factorization.

3912281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6282.

The product of its digits is 864, while the sum is 26.

The square root of 3912281 is about 1977.9486848753. The cubic root of 3912281 is about 157.5711411209.

The spelling of 3912281 in words is "three million, nine hundred twelve thousand, two hundred eighty-one".