3140921 has 4 divisors (see below), whose sum is σ = 3589632. Its totient is φ = 2692212.

The previous prime is 3140911. The next prime is 3140933. The reversal of 3140921 is 1290413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1290413 = 29 ⋅44497.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3140921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3140893 and 3140902.

It is not an unprimeable number, because it can be changed into a prime (3140911) 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, 224345 + ... + 224358.

It is an arithmetic number, because the mean of its divisors is an integer number (897408).

Almost surely, 2^3140921 is an apocalyptic number.

It is an amenable number.

3140921 is a deficient number, since it is larger than the sum of its proper divisors (448711).

3140921 is an equidigital number, since it uses as much as digits as its factorization.

3140921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448710.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 3140921 is about 1772.2643707980. The cubic root of 3140921 is about 146.4487506481.

The spelling of 3140921 in words is "three million, one hundred forty thousand, nine hundred twenty-one".