1013861 has 4 divisors (see below), whose sum is σ = 1017900. Its totient is φ = 1009824.

The previous prime is 1013851. The next prime is 1013879. The reversal of 1013861 is 1683101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 422500 + 591361 = 650^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013861 - 2¹⁸ = 751717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013851) 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, 1616 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (254475).

2^1013861 is an apocalyptic number.

It is an amenable number.

1013861 is a deficient number, since it is larger than the sum of its proper divisors (4039).

1013861 is an equidigital number, since it uses as much as digits as its factorization.

1013861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1013861 is about 1006.9066490991. The cubic root of 1013861 is about 100.4599148737.

Adding to 1013861 its reverse (1683101), we get a palindrome (2696962).

The spelling of 1013861 in words is "one million, thirteen thousand, eight hundred sixty-one".