1161616 has 20 divisors (see below), whose sum is σ = 2281600. Its totient is φ = 572832.

The previous prime is 1161599. The next prime is 1161617. The reversal of 1161616 is 6161611.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1161617) 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, 805 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (114080).

2^1161616 is an apocalyptic number.

1161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1161616 is a deficient number, since it is larger than the sum of its proper divisors (1119984).

1161616 is an equidigital number, since it uses as much as digits as its factorization.

1161616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 1000 counting only the distinct ones).

The product of its digits is 216, while the sum is 22.

The square root of 1161616 is about 1077.7829094952. The cubic root of 1161616 is about 105.1205267525.

Multiplying 1161616 by its sum of digits (22), we get a palindrome (25555552).

It can be divided in two parts, 11 and 61616, that multiplied together give a palindrome (677776).

The spelling of 1161616 in words is "one million, one hundred sixty-one thousand, six hundred sixteen".