10561091 has 4 divisors (see below), whose sum is σ = 10631184. Its totient is φ = 10491000.

The previous prime is 10561043. The next prime is 10561099. The reversal of 10561091 is 19016501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10561091 - 2⁶ = 10561027 is a prime.

It is a super-2 number, since 2×10561091² = 223073286220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10561099) 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, 34820 + ... + 35121.

It is an arithmetic number, because the mean of its divisors is an integer number (2657796).

Almost surely, 2^10561091 is an apocalyptic number.

10561091 is a deficient number, since it is larger than the sum of its proper divisors (70093).

10561091 is an equidigital number, since it uses as much as digits as its factorization.

10561091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70092.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 10561091 is about 3249.7832235397. The cubic root of 10561091 is about 219.3998172967.

Adding to 10561091 its reverse (19016501), we get a palindrome (29577592).

The spelling of 10561091 in words is "ten million, five hundred sixty-one thousand, ninety-one".