3147121 has 2 divisors, whose sum is σ = 3147122. Its totient is φ = 3147120.

The previous prime is 3147101. The next prime is 3147143. The reversal of 3147121 is 1217413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2768896 + 378225 = 1664^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 3147121 - 2¹³ = 3138929 is a prime.

It is not a weakly prime, because it can be changed into another prime (3147101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573560 + 1573561.

It is an arithmetic number, because the mean of its divisors is an integer number (1573561).

Almost surely, 2^3147121 is an apocalyptic number.

It is an amenable number.

3147121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3147121 is an equidigital number, since it uses as much as digits as its factorization.

3147121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 19.

The square root of 3147121 is about 1774.0126831565. The cubic root of 3147121 is about 146.5450478247.

The spelling of 3147121 in words is "three million, one hundred forty-seven thousand, one hundred twenty-one".