1061661 has 8 divisors (see below), whose sum is σ = 1464480. Its totient is φ = 683312.

The previous prime is 1061651. The next prime is 1061677. The reversal of 1061661 is 1661601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1061661 - 2⁵ = 1061629 is a prime.

It is a super-2 number, since 2×1061661² = 2254248157842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6015 + ... + 6188.

It is an arithmetic number, because the mean of its divisors is an integer number (183060).

2^1061661 is an apocalyptic number.

It is an amenable number.

1061661 is a deficient number, since it is larger than the sum of its proper divisors (402819).

1061661 is a wasteful number, since it uses less digits than its factorization.

1061661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12235.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1061661 is about 1030.3693512523. The cubic root of 1061661 is about 102.0145115839.

The spelling of 1061661 in words is "one million, sixty-one thousand, six hundred sixty-one".