1161816 has 16 divisors (see below), whose sum is σ = 2904600. Its totient is φ = 387264.

The previous prime is 1161791. The next prime is 1161829. The reversal of 1161816 is 6181611.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 48409 = 1161816 / (1 + 1 + 6 + 1 + 8 + 1 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24181 + ... + 24228.

2^1161816 is an apocalyptic number.

It is an amenable number.

1161816 is an abundant number, since it is smaller than the sum of its proper divisors (1742784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161816 is a wasteful number, since it uses less digits than its factorization.

1161816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48418 (or 48414 counting only the distinct ones).

The product of its digits is 288, while the sum is 24.

The square root of 1161816 is about 1077.8756885652. The cubic root of 1161816 is about 105.1265594113.

It can be divided in two parts, 1161 and 816, that multiplied together give a triangular number (947376 = T₁₃₇₆).

The spelling of 1161816 in words is "one million, one hundred sixty-one thousand, eight hundred sixteen".