1180661 has 2 divisors, whose sum is σ = 1180662. Its totient is φ = 1180660.

The previous prime is 1180657. The next prime is 1180691. The reversal of 1180661 is 1660811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1168561 + 12100 = 1081^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1180661 - 2² = 1180657 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 (1180631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590330 + 590331.

It is an arithmetic number, because the mean of its divisors is an integer number (590331).

2^1180661 is an apocalyptic number.

It is an amenable number.

1180661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1180661 is an equidigital number, since it uses as much as digits as its factorization.

1180661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1180661 is about 1086.5822564353. The cubic root of 1180661 is about 105.6919082866.

The spelling of 1180661 in words is "one million, one hundred eighty thousand, six hundred sixty-one".