1361111 has 4 divisors (see below), whose sum is σ = 1365000. Its totient is φ = 1357224.

The previous prime is 1361099. The next prime is 1361123. The reversal of 1361111 is 1111631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111631 = 127 ⋅8753.

It is an interprime number because it is at equal distance from previous prime (1361099) and next prime (1361123).

It is a cyclic number.

It is not a de Polignac number, because 1361111 - 2⁶ = 1361047 is a prime.

It is an Ulam number.

It is a Duffinian number.

1361111 is a modest number, since divided by 1111 gives 136 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361131) 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 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (341250).

2^1361111 is an apocalyptic number.

1361111 is a deficient number, since it is larger than the sum of its proper divisors (3889).

1361111 is an equidigital number, since it uses as much as digits as its factorization.

1361111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888.

The product of its digits is 18, while the sum is 14.

The square root of 1361111 is about 1166.6666190476. Note that the first 4 decimals coincide. The cubic root of 1361111 is about 110.8233263369.

Adding to 1361111 its reverse (1111631), we get a palindrome (2472742).

The spelling of 1361111 in words is "one million, three hundred sixty-one thousand, one hundred eleven".