3145661 has 2 divisors, whose sum is σ = 3145662. Its totient is φ = 3145660.

The previous prime is 3145633. The next prime is 3145669. The reversal of 3145661 is 1665413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2910436 + 235225 = 1706^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3145661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3145661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3145669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572830 + 1572831.

It is an arithmetic number, because the mean of its divisors is an integer number (1572831).

Almost surely, 2^3145661 is an apocalyptic number.

It is an amenable number.

3145661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3145661 is an equidigital number, since it uses as much as digits as its factorization.

3145661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 3145661 is about 1773.6011389261. The cubic root of 3145661 is about 146.5223827853.

The spelling of 3145661 in words is "three million, one hundred forty-five thousand, six hundred sixty-one".