16561034 has 16 divisors (see below), whose sum is σ = 28791936. Its totient is φ = 6997200.

The previous prime is 16561033. The next prime is 16561049. The reversal of 16561034 is 43016561.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 16560994 and 16561012.

It is not an unprimeable number, because it can be changed into a prime (16561033) 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, 7337 + ... + 9324.

It is an arithmetic number, because the mean of its divisors is an integer number (1799496).

Almost surely, 2^16561034 is an apocalyptic number.

16561034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16561034 is a deficient number, since it is larger than the sum of its proper divisors (12230902).

16561034 is a wasteful number, since it uses less digits than its factorization.

16561034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16741.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16561034 is about 4069.5250337109. The cubic root of 16561034 is about 254.8956846169.

Adding to 16561034 its reverse (43016561), we get a palindrome (59577595).

The spelling of 16561034 in words is "sixteen million, five hundred sixty-one thousand, thirty-four".