1103954561 has 6 divisors (see below), whose sum is σ = 1131098262. Its totient is φ = 1076821280.

The previous prime is 1103954521. The next prime is 1103954563. The reversal of 1103954561 is 1654593011.

It can be written as a sum of positive squares in 3 ways, for example, as 183196225 + 920758336 = 13535^2 + 30344^2 .

It is not a de Polignac number, because 1103954561 - 2⁶ = 1103954497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103954563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210155 + ... + 215343.

It is an arithmetic number, because the mean of its divisors is an integer number (188516377).

Almost surely, 2^1103954561 is an apocalyptic number.

It is an amenable number.

1103954561 is a deficient number, since it is larger than the sum of its proper divisors (27143701).

1103954561 is an frugal number, since it uses more digits than its factorization.

1103954561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419 (or 5230 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 1103954561 is about 33225.8116680391. The cubic root of 1103954561 is about 1033.5156707604.

The spelling of 1103954561 in words is "one billion, one hundred three million, nine hundred fifty-four thousand, five hundred sixty-one".