3124921 has 4 divisors (see below), whose sum is σ = 3153700. Its totient is φ = 3096144.

The previous prime is 3124903. The next prime is 3124943. The reversal of 3124921 is 1294213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1294213 = 173 ⋅7481.

It can be written as a sum of positive squares in 2 ways, for example, as 2359296 + 765625 = 1536^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3124921 - 2⁹ = 3124409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3124892 and 3124901.

It is not an unprimeable number, because it can be changed into a prime (3124321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14226 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (788425).

Almost surely, 2^3124921 is an apocalyptic number.

It is an amenable number.

3124921 is a deficient number, since it is larger than the sum of its proper divisors (28779).

3124921 is a wasteful number, since it uses less digits than its factorization.

3124921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28778.

The product of its digits is 432, while the sum is 22.

The square root of 3124921 is about 1767.7446082509. The cubic root of 3124921 is about 146.1996549141.

The spelling of 3124921 in words is "three million, one hundred twenty-four thousand, nine hundred twenty-one".