3921061 has 4 divisors (see below), whose sum is σ = 4056300. Its totient is φ = 3785824.

The previous prime is 3921059. The next prime is 3921079. The reversal of 3921061 is 1601293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1601293 = 29 ⋅55217.

It can be written as a sum of positive squares in 2 ways, for example, as 1640961 + 2280100 = 1281^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921061 - 2¹ = 3921059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921161) 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, 67576 + ... + 67633.

It is an arithmetic number, because the mean of its divisors is an integer number (1014075).

Almost surely, 2^3921061 is an apocalyptic number.

It is an amenable number.

3921061 is a deficient number, since it is larger than the sum of its proper divisors (135239).

3921061 is a wasteful number, since it uses less digits than its factorization.

3921061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135238.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 3921061 is about 1980.1669121566. The cubic root of 3921061 is about 157.6889275622.

The spelling of 3921061 in words is "three million, nine hundred twenty-one thousand, sixty-one".