3455921 has 6 divisors (see below), whose sum is σ = 4020210. Its totient is φ = 2962176.

The previous prime is 3455909. The next prime is 3455923. The reversal of 3455921 is 1295543.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 442225 = 1736^2 + 665^2 .

It is not a de Polignac number, because 3455921 - 2⁶ = 3455857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3455923) 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 5 ways as a sum of consecutive naturals, for example, 35216 + ... + 35313.

It is an arithmetic number, because the mean of its divisors is an integer number (670035).

Almost surely, 2^3455921 is an apocalyptic number.

It is an amenable number.

3455921 is a deficient number, since it is larger than the sum of its proper divisors (564289).

3455921 is an equidigital number, since it uses as much as digits as its factorization.

3455921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70543 (or 70536 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 3455921 is about 1859.0107584412. The cubic root of 3455921 is about 151.1893739675.

It can be divided in two parts, 34 and 55921, that added together give a palindrome (55955).

The spelling of 3455921 in words is "three million, four hundred fifty-five thousand, nine hundred twenty-one".