1011861 has 6 divisors (see below), whose sum is σ = 1461590. Its totient is φ = 674568.

The previous prime is 1011827. The next prime is 1011889. The reversal of 1011861 is 1681101.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 72900 = 969^2 + 270^2 .

It is not a de Polignac number, because 1011861 - 2⁶ = 1011797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56206 + ... + 56223.

2^1011861 is an apocalyptic number.

It is an amenable number.

1011861 is a deficient number, since it is larger than the sum of its proper divisors (449729).

1011861 is a wasteful number, since it uses less digits than its factorization.

1011861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112435 (or 112432 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1011861 is about 1005.9130181084. The cubic root of 1011861 is about 100.3938137382.

Adding to 1011861 its reverse (1681101), we get a palindrome (2692962).

The spelling of 1011861 in words is "one million, eleven thousand, eight hundred sixty-one".