1104609561 has 16 divisors (see below), whose sum is σ = 1701217728. Its totient is φ = 630080000.

The previous prime is 1104609553. The next prime is 1104609589. The reversal of 1104609561 is 1659064011.

It is not a de Polignac number, because 1104609561 - 2³ = 1104609553 is a prime.

It is a super-2 number, since 2×1104609561² = 2440324564505225442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1104604561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 983940 + ... + 985061.

It is an arithmetic number, because the mean of its divisors is an integer number (106326108).

Almost surely, 2^1104609561 is an apocalyptic number.

1104609561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1104609561 is a deficient number, since it is larger than the sum of its proper divisors (596608167).

1104609561 is a wasteful number, since it uses less digits than its factorization.

1104609561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969032.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1104609561 is about 33235.6670009795. The cubic root of 1104609561 is about 1033.7200327118.

It can be divided in two parts, 110460 and 9561, that added together give a palindrome (120021).

The spelling of 1104609561 in words is "one billion, one hundred four million, six hundred nine thousand, five hundred sixty-one".