3146921 has 6 divisors (see below), whose sum is σ = 3343230. Its totient is φ = 2961536.

The previous prime is 3146911. The next prime is 3146953. The reversal of 3146921 is 1296413.

It can be written as a sum of positive squares in 3 ways, for example, as 440896 + 2706025 = 664^2 + 1645^2 .

It is not a de Polignac number, because 3146921 - 2¹⁰ = 3145897 is a prime.

It is a super-2 number, since 2×3146921² = 19806223560482, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3146911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5156 + ... + 5733.

It is an arithmetic number, because the mean of its divisors is an integer number (557205).

Almost surely, 2^3146921 is an apocalyptic number.

It is an amenable number.

3146921 is a deficient number, since it is larger than the sum of its proper divisors (196309).

3146921 is a wasteful number, since it uses less digits than its factorization.

3146921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10923 (or 10906 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 3146921 is about 1773.9563128781. The cubic root of 3146921 is about 146.5419434392.

The spelling of 3146921 in words is "three million, one hundred forty-six thousand, nine hundred twenty-one".