1447661 has 2 divisors, whose sum is σ = 1447662. Its totient is φ = 1447660.

The previous prime is 1447639. The next prime is 1447711. The reversal of 1447661 is 1667441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1394761 + 52900 = 1181^2 + 230^2 .

It is an emirp because it is prime and its reverse (1667441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1447661 - 2¹⁰ = 1446637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1447631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723830 + 723831.

It is an arithmetic number, because the mean of its divisors is an integer number (723831).

2^1447661 is an apocalyptic number.

It is an amenable number.

1447661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447661 is an equidigital number, since it uses as much as digits as its factorization.

1447661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 1447661 is about 1203.1878490078. The cubic root of 1447661 is about 113.1242270737.

The spelling of 1447661 in words is "one million, four hundred forty-seven thousand, six hundred sixty-one".