1461661 has 2 divisors, whose sum is σ = 1461662. Its totient is φ = 1461660.

The previous prime is 1461659. The next prime is 1461667. The reversal of 1461661 is 1661641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454436 + 7225 = 1206^2 + 85^2 .

It is an emirp because it is prime and its reverse (1661641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1461661 - 2¹ = 1461659 is a prime.

Together with 1461659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730830 + 730831.

It is an arithmetic number, because the mean of its divisors is an integer number (730831).

2^1461661 is an apocalyptic number.

It is an amenable number.

1461661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461661 is an equidigital number, since it uses as much as digits as its factorization.

1461661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 1461661 is about 1208.9917286731. The cubic root of 1461661 is about 113.4877240308.

The spelling of 1461661 in words is "one million, four hundred sixty-one thousand, six hundred sixty-one".