3920281 has 4 divisors (see below), whose sum is σ = 4090752. Its totient is φ = 3749812.

The previous prime is 3920269. The next prime is 3920299. The reversal of 3920281 is 1820293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3920281 - 2⁷ = 3920153 is a prime.

It is a super-2 number, since 2×3920281² = 30737206237922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3920201) 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, 85201 + ... + 85246.

It is an arithmetic number, because the mean of its divisors is an integer number (1022688).

Almost surely, 2^3920281 is an apocalyptic number.

It is an amenable number.

3920281 is a deficient number, since it is larger than the sum of its proper divisors (170471).

3920281 is a wasteful number, since it uses less digits than its factorization.

3920281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170470.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3920281 is about 1979.9699492669. The cubic root of 3920281 is about 157.6784707394.

The spelling of 3920281 in words is "three million, nine hundred twenty thousand, two hundred eighty-one".