3142921 has 4 divisors (see below), whose sum is σ = 3146500. Its totient is φ = 3139344.

The previous prime is 3142907. The next prime is 3142939. The reversal of 3142921 is 1292413.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 774400 = 1539^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 3142921 - 2⁷ = 3142793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3142892 and 3142901.

It is not an unprimeable number, because it can be changed into a prime (3142901) 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, 535 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (786625).

Almost surely, 2^3142921 is an apocalyptic number.

It is an amenable number.

3142921 is a deficient number, since it is larger than the sum of its proper divisors (3579).

3142921 is a wasteful number, since it uses less digits than its factorization.

3142921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578.

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

The square root of 3142921 is about 1772.8285309076. The cubic root of 3142921 is about 146.4798280884.

The spelling of 3142921 in words is "three million, one hundred forty-two thousand, nine hundred twenty-one".