1061861 has 4 divisors (see below), whose sum is σ = 1071372. Its totient is φ = 1052352.

The previous prime is 1061849. The next prime is 1061867. The reversal of 1061861 is 1681601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1681601 = 43 ⋅39107.

It can be written as a sum of positive squares in 2 ways, for example, as 11236 + 1050625 = 106^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061861 is a prime.

It is a super-2 number, since 2×1061861² = 2255097566642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4586 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (267843).

2^1061861 is an apocalyptic number.

It is an amenable number.

1061861 is a deficient number, since it is larger than the sum of its proper divisors (9511).

1061861 is an equidigital number, since it uses as much as digits as its factorization.

1061861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510.

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

The square root of 1061861 is about 1030.4663992581. The cubic root of 1061861 is about 102.0209171507.

The spelling of 1061861 in words is "one million, sixty-one thousand, eight hundred sixty-one".