1061561 has 2 divisors, whose sum is σ = 1061562. Its totient is φ = 1061560.

The previous prime is 1061527. The next prime is 1061569. The reversal of 1061561 is 1651601.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 295936 = 875^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061561 - 2¹⁸ = 799417 is a prime.

It is a super-2 number, since 2×1061561² = 2253823513442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1061569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530780 + 530781.

It is an arithmetic number, because the mean of its divisors is an integer number (530781).

2^1061561 is an apocalyptic number.

It is an amenable number.

1061561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061561 is an equidigital number, since it uses as much as digits as its factorization.

1061561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1061561 is about 1030.3208238214. The cubic root of 1061561 is about 102.0113084989.

The spelling of 1061561 in words is "one million, sixty-one thousand, five hundred sixty-one".