4313921 has 2 divisors, whose sum is σ = 4313922. Its totient is φ = 4313920.

The previous prime is 4313917. The next prime is 4313927. The reversal of 4313921 is 1293134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 703921 = 1900^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 4313921 - 2² = 4313917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4313927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156960 + 2156961.

It is an arithmetic number, because the mean of its divisors is an integer number (2156961).

Almost surely, 2^4313921 is an apocalyptic number.

It is an amenable number.

4313921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4313921 is an equidigital number, since it uses as much as digits as its factorization.

4313921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 4313921 is about 2076.9980741445. The cubic root of 4313921 is about 162.7886278723.

The spelling of 4313921 in words is "four million, three hundred thirteen thousand, nine hundred twenty-one".