3921073 has 8 divisors (see below), whose sum is σ = 4271400. Its totient is φ = 3577728.

The previous prime is 3921059. The next prime is 3921079. The reversal of 3921073 is 3701293.

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 3489424 = 657^2 + 1868^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3921073 - 2⁹ = 3920561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921079) 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 7 ways as a sum of consecutive naturals, for example, 538 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (533925).

Almost surely, 2^3921073 is an apocalyptic number.

It is an amenable number.

3921073 is a deficient number, since it is larger than the sum of its proper divisors (350327).

3921073 is a wasteful number, since it uses less digits than its factorization.

3921073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3921073 is about 1980.1699422019. The cubic root of 3921073 is about 157.6890884256.

It can be divided in two parts, 39 and 21073, that added together give a palindrome (21112).

The spelling of 3921073 in words is "three million, nine hundred twenty-one thousand, seventy-three".