1045561 has 6 divisors (see below), whose sum is σ = 1149386. Its totient is φ = 950400.

The previous prime is 1045559. The next prime is 1045571. The reversal of 1045561 is 1655401.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 435600 = 781^2 + 660^2 .

It is not a de Polignac number, because 1045561 - 2¹ = 1045559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4200 + ... + 4441.

2^1045561 is an apocalyptic number.

1045561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1045561 is a deficient number, since it is larger than the sum of its proper divisors (103825).

1045561 is an equidigital number, since it uses as much as digits as its factorization.

1045561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663 (or 8652 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1045561 is about 1022.5267722656. The cubic root of 1045561 is about 101.4962021438.

It can be divided in two parts, 104 and 5561, that added together give a palindrome (5665).

The spelling of 1045561 in words is "one million, forty-five thousand, five hundred sixty-one".