1561118 has 16 divisors (see below), whose sum is σ = 2551920. Its totient is φ = 711936.

The previous prime is 1561117. The next prime is 1561121. The reversal of 1561118 is 8111651.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1561093 and 1561102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561111) 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, 2213 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (159495).

2^1561118 is an apocalyptic number.

1561118 is a deficient number, since it is larger than the sum of its proper divisors (990802).

1561118 is a wasteful number, since it uses less digits than its factorization.

1561118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 240, while the sum is 23.

The square root of 1561118 is about 1249.4470777108. The cubic root of 1561118 is about 116.0054991448.

Adding to 1561118 its reverse (8111651), we get a palindrome (9672769).

The spelling of 1561118 in words is "one million, five hundred sixty-one thousand, one hundred eighteen".